I'm going to say something that rubs against the grain a bit. be warned.
there are no specialist tools required to build a ukulele that you can't make yourself or that there isn't a replacement available in the world of woodworking.
you don't need a nodged straight edge (only of use if you are leveling a premade neck)
you don't need an expensive leveling beam (a 16" length of hardwood and a quick swipe with the plane)
you don't need a fret dressing file (you can grind a safe edge on any file you wish)
fret snips, a pair of side cutters
sawing a nut can be done without special saws and files
fret slotting saw, 0.72mm kerf, or pretty much any gents or Japanese saw.
fret rubbers, emery board for filing nails.
you do need decent wet and dry.
the 3 tools I made to do my electric uke build
a flat ground set of side snips for cutting the frets
a rolled save edged jewellers file for fret dressing (I'm making a bigger one for guitar work)
a piece of pine as a levelling beam, I knew it was flat, I'd planed it that way 2 minutes before using it.
if you find you like doing this sort of thing, then you invest in the tools, till then, you make what you need.