Just about finished with mine, and thought some details might be helpful.
Rogue Echo colored bumpers are less than $2/lb. My 160 pound set was $295. They are in stock now, which isn't always true.
Birch plywood near me that is labeled and sold as 3/4" ply is (if you read the fine print) only 0.720" (roughly 23/32") thick, and mine is several thousandths thinner. Sometimes my homedepot only has plywood sold as 23/32", which I assume is even thinner. But it all worked out because the 3/4" horse stall mat from Tractor supply was really 0.700 inches thick. So the height difference is only about 1/64, which doesn't feel like a tripping hazard.