Not sure If you are a welder but if you check out roustabout lifts you might get some ideas to build one. You can probably build one from a broken engine hoist and an electric winch.

Just so you have an idea:

Broken engine hoist:
https://newjersey.craigslist.org/tls/5471927577.html

Roustabout:
http://bubbatool.com/product/sumner-r-250-15ft-roust-a-bout/?gclid=CISSweWascsCFQsnHwodKaAPeA