I used Dean's idea and build mine out of old shipping crate material from Italy.The wood stands I painted black and the metal ( 3" x 10", really some metric size ) I painted Ford Blue. I cut two 3" x 7" tube steel in half and welded them to a 7" piece to get the 10" + - width. I pinned the bridge and ramps to the wood stands. The height is 13 1/4", just right for working under the car. One person can easily put it up or take it down. Stores in a 10' x 14" space.
Cost about 10 lbs of flux core and a gal of paint and primer, about $75. And some screws and 1/4 x 20 bolts and fender washers. Oh yes, a lot of hours.
Dwight
I can remove the bridge to work under the car, but most of the time I leave them in place
long but fun story behind this picture