I started with an old ex-military metal tanker desk from Craigslist.
Took the top and legs off, welded the two pedestals together vertically, made a metal top and attached casters to the bottom. Then I filled in the seam with Bondo and painted it today and now I've finally got a good place to keep my hand tools together, organized and handy. It's got 4 regular size drawers (all 28" deep), two thin drawers and a double height drawer at the bottom for larger stuff, all mounted on full extension slides. I still have to make some more drawer dividers (there's slots in each drawer to support them) and I'll be buying some shower underlayment sheet for tool cushioning on the floor of each drawer. I spent some extra time making the original drawer lock work for all the drawers but I'll probably never use it except maybe when transporting it. It's not as heavy as when it was a desk but it's still heavy enough that I use my hoist to lift it. Total invested: $60 including desk, paint, Bondo and casters.
Ignore the fat, stupid hand print in the middle of the top drawer where a moron put his fat stupid hand in wet paint. I'll fix it when it bothers me enough.