Well, we'll see what is possible next spring when my new shoulder is 5 months old (going for the chop on 20 October).
I used to do everything on cars: bodywork, mechanical, exhausts. I do no car work any more.
I still do nearly everything while rebuilding our 1857 house (though we hired a contractor for the back porch / sunroom rebuild): carpentry, cabinet building, electrical, stonework, plaster, stucco, plumbing, painting, concrete and stone flooring, ceramic tile, heating system distribution piping, making/restoring windows. It's nearly finished so less work is anticipated. The barn does not touch the ground as much as appropriate, though.
I do some furniture making. More planned now that the house is nearly done: master bed, cabinets for the 850+ Ampico piano rolls, dining room table leaves. About time I make a chair!
I've restored a 1950's Flying Dutchman sailboat: veneer, deck, frames, stringers, thwart, kick-up rudder, centerboard, hardware. Two more FD reside in the barn.
I did all work required on the Morgan 27, including new engine mounts, sole, new chainplates, custom sewn items/covers, and the rest of the normal stuff, for the years we owned her.
I did all work required on the LeComte Northeast 38, including anchor winch, total rebuild of the head, interior woodwork, winch bases, clean-up PO wiring, water system and the rest...until we put her on the market (where she still is BTW).
We bought the trawler in January '16, due to our age-related decrepitude. Others will do seasonal engine maintenance, save for checkups and emergencies. Others will paint the bottom and winterize her. I will (attempt) to do all other maintenance and improvements, custom woodwork. I have done the new mast, dinghy and kayak davits, electric toilet, flybridge ladder.