I made a stand 15 years ago using scrap lumber; 2 x 4s for a frame & 5/8" plywood for a top. Screwed it together with drywall screws. It has 6 legs (one at each corner & one on either side in the middle) and I used some 1 x 4s for cross-bracing. Dimensions are 8 ft long, 2 ft wide, 16 inches high. I use a 2 x 10 for a ramp, and I can easily push a bike up onto it by myself. I use a short step stool (home made) to help me get up on the platform so I can pull the bike up onto the centerstand. I use tie-downs on the handlebars to the 1 x 4 cross bracing to keep the bike from tipping. I store the ramp underneath the platform, resting on the cross-bracing. I've used it extensively for supporting a '71 Guzzi Ambassador (read as HEAVY). Last year I got fancy and took the wheels out of a couple heavy duty casters and lag bolted them to the center legs. Now I can wheel the stand around easily, even with a bike strapped onto it.
I made a second one about a year ago that consists completely of plywood. The pieces slide together with slots without the need for screws. When the stand is not in use it can easily be disassembled into flat sheets. Found the plans on the internet.
I've always wanted one of the fancy lifts, but now I can't justify it; my home built platforms work too good.