Craftsmen has a combo set, "gunmetal" chrome or some such, has a pretty complete set of 1/2 3/8 1/4 ratchets and sockets metric and standard, as well as a decent assortment of open end box end wrenches, and the usual hex bit screw driver set. Don't remember what I paid for them, but it wasn't horrible, and the quality is better then I expected, I would supplement with a Crescent Hammer (chinese calipers, Canadian nut lathe, Swedish thumb detector) a proper hammer hammer, and some vice grips, maybe some wiring tools?
Keep one in the dumb truck, ye Ole Crummy, and the DisService truck are largely stocked with one each, the Self loather came with most of its own tools.
the case it comes in is fairly flat and tucks in behind the seats where its usually forgotten about until needed, or dump the whole works into a 50. cal. ammo can whateves.
I mostly run older equipment, and do 95% of my own wrenching, the little craftsmen set hasn't let me down on most things, though I do have a ridiculous need for oversize sockets and wrenches that far out paces what the little kit can do, hence the DisService truck.