We have put three of these stands up on our property. One guy builds it at home and then marks it and takes it apart and brings it up to the cabin. I think the platform is about 52" square, enough for two if needed. We have swivel office chairs in them. I think they cost about $350 total. It took us about a day and a half to put it up. treated 4X4 legs and all other wood is treated as well. We use carpet as siding. Really blocks the wind and muffles sound.
We did use a tractor to put it up, but I think if you had some extra 2x4s you could make push rods to lift it up and use rope to let it settle down slowly. We built just the platform and legs (with supports) minus the floorboards, on the ground. then lifted it and then assembled it the rest of the way. We used nuts and bolts to put it all together, mostly 1/4 20s for the supports, but we used one size larger for the corners where the platform connects to the leg.
You can see the ladder that we use to get up it, its just made of 2x6s with 2x4 steps and made long enough, and wide enough, for an easy climb, some of our hunters aren't too nimble.
We used scrap 2x6 or 2x8 pieces to put under the legs to help level it.