Could an electric winch like this work?

I believe it could assist in lifting, the key is proper installation and finding a vest with the strength to hold your weight safely.

abacoian I'd say it could work as long as it's mounted safely and securely. If you could get someone to fabricate a steel bar with a hook on each end, you could hook that bar onto the winch hook and use a regular sling.

So basically get one of these made that'll hook onto the winch -

Have not done such a scandalous thing yet but am really thinking of going for it. The one part I'm not seeing yet is what kind of vest would not be too complicated.

Instead of a vest, what about a climbing harness? You would have to be able to roll at least onto your side but you can get both full-body and upper or lower body harnesses. Climbers are really resourceful - maybe stop by a climbing store or REI and talk to them.

My son had put one in my garage for me prior to me getting a standing frame. I had a 5 point harness,though it took a bit to get it adjusted. Would probably go with a smaller climbing harness instead if I was still needing it. He had a small block engine hoist, with a remote controller for it.he had it next to my ramp railing so I could hold on to it and be able to guide myself back into my chair.
I would check out out a hoist from an auto parts place verses a handicap place just for the sake of cost.

Look at a small engine hoist. Anything designed for the handicap will be much more expensive. Engine hoist can also come with a remote controller and then a climbing harness. It would not need to be put on tight like for climbing just enough to get It on and all points are fastened