Years ago (when I was a boy> when I was working out of a single garage I built a swing lift a bit like the one below but a lot less industrial. The good thing about it was when you were finished with it it just swung against the wall out of the way. Not hard to build and nothing to store or put away. You will need to brace the top to the roof joist.
http://sandexian.en.alibaba.com/prod....html#inSearch
Bob