Probably shouldn't respond.......I have 3k sq ft of "personal space".This is just our studio/shop.It's a little too much...
But am just going to throw a few things at the discussion from personal experience(have designed/built a 1/2 dz shops).My loading dock(600 sg feet)...the spraybooth(500 sgft.)....and my sink,which was a freeby from a plumber friend(1930's enameled,low-rise mop sink)...Basically,"trumps" everything else in the shop.
My retired builder buds and I sit on the cvrd loading dock and...well,do what retired guys do.The spraybooth has a bunch of nice M/C's in it(easily moved).And the sink gets used a dz times a day.Oh,and a really nice sm two-pce bathroom(was roughed in for shower,that never got installed).
If you could find a local builder guy...preferably retired.Bend his ear on some ideas for your particulars.Best of luck,BW