Why just the old? I’m “young” and could benefit from an iron man suit

Ha, to some degree couldn’t we all? But assuming you can negotiate a flight of steps and stand up from the dining table without trouble, your benefit strikes me as less pressing than, say, that of my mother-in-law.

I just do a lot of DIY construction. Being able to lift even 100kg safely would be a game changer.

The trades would benefit enormously from such a thing.

I was just thinking trades wouldn't benifit that much. We have trucks and cranes and stuff.

What construction material weighs 100kg? All the stuff is made to be installed by a guy or two. Big stuff is hoisted with cranes, heavy concrete is pumped. A sheet of plywood is carried by one man, a cement block gets plopped 2 feet from where it needs installed one by one, doors and windows are a one man show.