i used a old blue print, scaled my shop, then measured all the equipment i thought i'd have or use, and scaled them, then drew out the shop, did cut outs for the equipment in a cardboard colored, so i could move equipment all over, trying to find the right ""FLOW" which i have not at this time determined, while shop is 95%, i lack the new dust collection system, which will go in next few months, best thing i did was make a mech room outside shop footprint to put air compressor and collector.
it did assist in figuring out some of the layout, but like a tool nut i am, added another 10''cab saw, larger drum sander, and ''stuff'', so now space becomes a commoditity, so one will see.
good luck with layout, know the first, second and maybe the third will not be the ''one
rj in az