Just get the 2 1/2 ton Harbor Freight aluminum one. The convienence of it’s weight and portability is worth the sacrifice in quality. I still have a 50lb all steel Craftsman for back up, but hate lugging it around.
It’ll break one day, but after reading reviews I would rather buy 3 of those than 1 aluminum Craftsman.
3" min height
http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber=91039
I think I got mine on sale for $65