I've mentioned it before, but it's germane to the topic.
Years ago- too many years ago- I built an entire car, by grafting a junk, rusty, engineless '65 Chevy Corvair body, to a 1977 Chevy Blazer frame and running gear. It wasn't a particularly wild modification- I wasn't the first to do something like that, and wasn't by any means the last- but it was pretty involved for a punk kid on a nonexistent budget.
And virtually every tool I used, could have fit into the back of a shortbed pickup, with nothing sticking up over the edge, and with room to spare.
I had a Milwaukee corded hand drill, maybe a dozen drill bits (most of which were dull) a 9" angle grinder, a chinzy plastic bodied bench grinder, a decent drill press (decent except the lowest speed was still too fast for drilling steel with anything but the smallest drills- hence the "dull" part) and a Lincoln "tombstone" AC buzzbox welder.
Over the course of the build, I bought myself a jigsaw to help cut out aluminum panels, a couple of air tools like a pistol grip sander and a die grinder with a cut-off wheel, and the big purchase, which I had to save up for several months for, a $700 Hobart "suitcase" 110V MIG welder.
Apart from that, I only had hand tools. Sockets, combination wrenches, screwdrivers, a couple hammers, two or three dull, coarse files, maybe a hacksaw.
That really was about it.
No mill or lathe, and no access to them either. No TIG welder, no bandsaw- or portaband saw- no abrasive chop saw, no plasma cutter, no MIG that could weld anything thicker than 1/8" steel, no sandblaster, no anvil, no parts washer, no spoolgun.
None of my specialty hand tools like body hammers, sheetmetal nibblers or even proper wire strippers.
And all that skips over the fact I used reclaimed metals (I'd cut sections of sheetmetal off junk car hoods and doors and basically built the whole thing on an extremely tight budget.