I'm not a tech but I got friends who are. Most of them have some gear that works for them and they try to travel as light as they can. I think they got work by getting friendly with TMs and guitarists (and that they know what they're doing).
My personal tech box is as follows=
It's a custom made flight box that's 1u wide. I mounted a cheapish Korg rackmount tuner in there, cut out some foam to put tools into for easy access (peg winders, screwdrivers, torches ect) and storage compartments for stuff like picks, cables, strings, cleaning stuff, ect ect. At the bottom of the case, I mounted a small marshall ms2 amp and a cable tester. Literally everything I've ever needed to service a guitar or amp is in that box. I'm looking into some luthier tools for fret work and better action adjustment but for now, I'm happy that I could service any guitar with what I have.
The other guitarist in my band is pretty awful (but a great friend/person) so I service her guitars for her regularly. She buys some of the shittiest guitars and expects me to make them good
I'm sure you'll get good use out of all the tools you buy. More important than what you take is what you do with what you take.
Oh I've found keeping a diary of problems for each bit of gear helps too, so when you service it next time, you know to check on previous repairs
Les Paul > Line6 G50 > 6505+
Get drunk and loud and move around.
Everything I said is just my 0.02 cents and not to be taken too seriously! I don't mean any harm, even if I inadvertently caused some!