I purchased an old 4post hoist last year ....  you would categorise as "scrap metal" :)    Its bloody fantastic.   I wanted a 4post as the cement slab is garbage and not to be trusted.   Its the best thing since sliced bread.   
https://www.aussiefrogs.com/forum/in...743-jpg.210177
I couldn't understand how it worked, until it was together.  Its a "wheels free" hoist.   So the "yellow" frame can be left behind to support the car.
https://www.aulro.com/afvb/attachmen...128_170534.jpg
You can buy 240volt single phase power units/pumps with built in "everythign" required to run the hydraulic rams from $270 delivered through Vevo.