This saw horse folds down to just 3 and a half inches deep and can be hung on a wall or stored in narrow gaps.
It features a versatile, interchangeable cross bar - multiple cross bars can be made for varying lengths and purposes, including in/out-feed rollers, carpeted/padded (won't mar finished surfaces), notched for holding clamps, or just plain sacrificial cross bars that can be thrown out when the saw has cut through the top edge too many times. The support rope at the bottom can be left on at all times and can be retied/tightened if it stretches.
Two 2x4s and one 1x4 builds the whole thing. The only hardware needed is 4 fender washers, 2 3.5" bolts, 2 nylon nuts and a 5 or 6 feet of rope.