I'd just get those things up on a cart or something with wheels. you might need some blocks on top of the cart to support it. If you can wrap it up and then just push it yourself it'll be easier as you wont; have to keep breaking the project up or calling for help. If you don't have a furniture dolley , they are easy to make , usually a couple of sheets of plywood with 4 suitable wheels. Movers use them a lot , usually they cover them in carpet and make a hole to use as a carry handle. then later they are handy for moving heavy items. I made a smaller one to fit my welder so if I want it then I lift the welder off it and when not in use I just keep it under the welder so it's easy to move around. you can lift almost anything yourself if you just use a pry bar and an assortment of blocks, just lift one corner at a time and stick in more blocks as you circle the item. You just have to always be sure you aren't tipping it so much it's in danger of toppling.
I often move extremely heavy machines this way by myself. sometimes I just use little pieces of pipe or steel dowels rather than wheels. if it's extremely heavy maybe steel plates for the rollers to roll on.
a bit of ingenuity saves your back. riggers use "skates" but you won't need those. Ill post a link. it has a handle to steer the skate with.. its overill for what you need there,
https://riggingcanada.ca/store/general- ... nnEALw_wcB a piece of 1/4" steel dowel will do to roll on. thin steel plates agains the rollers give them something other than wood to roll against.
If you don't lift things more than enough to clear the floor they won't tip over on you. one way you can get into trouble is if you use 4 wheels and the item is high above the floor , then one gets free because weight can be such that it is sitting on three wheels and the whole thing can topple. I can move almost any object by myself although not quickly, safely and without using muscle. with heavy machinery you can forget about using your muscles but its surprising how much you can move yourself with just little bits of steel rod some various blocking , steel plates little rollers and not hurt your back. sometimes a little hydraulic car jack works if there is room for it instead of prying.
you might envision the piano sitting on 2 sheets of plywood with little steel rollers ( 1/4" steel rods) between the sheets of plywood. as you push the little rollers just roll between the sheets. the piano moves almost effortlessly. eventually you reposition the rollers and the lower plywood. the piece of plywood the piano sits on stays put in relation to the piano..
and you can steer it by placing the rollers the way you want. If the piano was so heavy the steel roller wanted to indent in to the plywood you can place sheets of steel between. - probably not necessary for the weight of a piano, maybe if it were as heavy as a car or a tractor.
You can use thin plywood to protect the floor if it's going to mark up the floor. of course if you use a pry bar to lift a piano you'd want something on top of the floor so your pry bar wouldn't touch the floor and mark it. the piano might have feet that are hard to pry under so you could use a couple large wood blocks between the floor and a suitable part of the frame then stick the pry bar between the two wood blocks so you don' mark up your piano or the floor. the pry bar will only lift so much but then if you use a stack of blocks you can rearrange them to take the weight, and then you can reposition your blocking for another pinch upwards.
You might consider laying two sheets of plywood on the floor and then get help to put the piano on top of they plywood. and after that you can move it about yourself this way. you might need to position more plywood to roll onto as you go. you might sub the plywood for a plank or whatever you have handy. usually if you just look around you can find stuff that will work that you have handy.
I'd have some concerns about getting a team of guys that are lifting your items. one may hurt his back , or they may not work in synch if you don't have a clear plan and define who is leader. Ive seen many arguments and excited people when you get guys all trying to move something heavy that aren't used to doing it. . so I'd just use little blocks and rollers and stuff and it is harder to explain than do but you don't ever need to use your back to lift the thing clear of the floor and carry it. Just do it in small increments and be careful about putting it in a position where it can tip.
I've worked with heavy machinery movers. they come with flatdecks and cranes and all the equipment like lots of blocking, skates steel plates. there is always one lead hand and everyone listens to him and no one else just like he's an army drill sargent, his job is to command and watches everything. It can be dangerous otherwise. If machine tips don't think you can stop it or jump clear. people initially have the reaction they can stop something falling over and then sometimes get squished.
everyone has been in the position where you have two people moving a couch with different ideas and that easily leads into an argument or two people with different ideas;-) That's why I'd go at it with just a little pry bar and little bits of steel rod and then I'm in control of the situation and not stressed or fatigued. Its a little puzzle but usually not so hard. If you stop and just thing and figure out each move like it were a chess game it will happen with no damage or stress or hurry up. Get a group together and everyone gets all gung ho and that's where accidents happen. don't use big rollers and then it'll keep the load very close to the floor and there will be no tipping over. 1/4" dowel is enough. you might just support the frame part and any legs are likely not carrying that much of the weight. you want to avoid twisting the frame by placing all the weight on the legs so first think about where most of the weight is , that's where you need a roller or two. you won't want to stress the frame in a way it isn't made for or it could warp something. my concern might be if you have one strong buddy lifting in a weak spot then he might cause damage before he realizes what he's done. or someone trips or sneezes or farts then everyone breaks into laughter while carrying. I've seen that happen
I bet you've got most of the weight on some feet under the heavy frame part and it may have ornamental legs that are basically just outriggers so that the load cant' tip. If you tried to lift the whole weight by one leg you might cause damage by twisting the structure if it isn't made to carry that much weight. How the weight is distributed might be really important to prevent any twisting stresses. You might even remove the legs if it makes sense to , to prevent that.
sorry I ramble so much
I stripped my living room walls and refinished the floors in there . It took forever and I still have to replace the trim. during the dusty stages I threw in a temporary living room door and found that was nice as I could go make dust clouds without much coming in to the other areas. I borrowed a little rolling scaffold and that helped when I did the ceiling drywall. less fatigue than working on ladders.