I can tell you what's on my own buy-list:
Battery powered sawzall, ideally also an angle grinder
drill powered wire stripper
One of these push-wagons for bigger loads with three wheels on each side for steps




And what I already own:
Manual wire stripper (15$)
digital readout scale with detachable display and battery powered (40$)
Wire clipper (10$) - Upgrade with the spring out of a clothespin so it opens up by itself to save your hands
Tools to dissasemble PCs (torx bits are most important)
Small battery powered screwdriver with lots of bits.
all the pliers you can get your hands on
A bolt cutter
Hammer
File
Magnet
Manual saws of different varieties. I don't use them too much for disassembly, but they can come in handy now and then.

That's it probably, I guess I forgot some stuff.