My mother-in-law bought me an excellent tool set from Craftsman last year. My problem is I rarely return a tool to its appropriate place. If I am combining, many of my tools wind up in the combine, baling, in the baler tractor, etc, then I forget where I put them. I think it would be nice to have a small set in each machine, although pricey. Our most commonly used wrenchs are 1/2, 9/16, 3/4 and 15/16. If they made a tool set with those, a nice hammer to smack things with, a crescent wrench or two, and maybe a roll of duct tape and a set of electrical connections and fittings, that would cover most of my needs most of the time.
A young man who helps me sometimes made an observation once in reply to me complaining how I never have the right tools. He said, "it isn't so much you don't have the right tools, you just seldom know where they are". Maybe your daughters boyfriend needs a really nice toolbox??