what i've done, and it might work for you, is to get a bunch of 1.5" x 1.5" angle iron and weld up a frame the size you need for the top. then turn it up-side-down and start welding legs, shelves, etc., until you get what you want. then turn it over and mount the tool/equipment.
actually pretty simple to make and can be made as strong as needed by adding angled braces, shelves, sides, etc.
i like steel stands 'cause later on when you decide you need another shelf or bracket or tool holder or whatever you can just weld it on wherever you want it. and you can weld on a couple of casters an inch or two up two adjacent legs so you can tilt the entire stand/tool on its side and roll it to wherever you want.
i've also made the standard junkyard wheel/4" pipe/rectangular plate grinder stand. i bet about everyone on here has one of these.
i've made a welding table, grinder stand, sander stand, and a frame with casters that i set my table saw into. these are all steel and have been made within the last five years.
a long time ago i made a plywood box to use for a scroll saw stand. about 12"w x 16"d x 30" tall with no bottom in it. it still had quite a bit of vibration (inexpensive saw) so i turned the whole deal up-side-down and poured a bag of sakrete into it; waited 'til it was set and returned it to upright. you can turn the saw on now and there's absolutely NO vibration at the table. i did that about 20 years ago and it still works great. but if i were to make a stand for the same saw today i'd weld it from steel.