I bought a floor jack, got some old heavy wall steel fence posts and did this...
It took me a bit to figure the geometry, but it works.
As the floor jack lifts the front, the back seems to hesitate, then comes up a little later...then when fully up, the bike set's fairly level.
I guess if you had to buy all the pipe etc. it could cost a $200 including the floor jack.
An air over hydraulic jack would be nicer, but I have the expensive Handy Lift now, so I never retrofitted this lift with the air/hydraulic jack.
Need better pic's, and measurements?? just ask, I'll go out and do it.