The main tools you need is a good set of metric combination wrenches and sockets.
We are kindred spirits David ;-}
I invested in tools as well and have what I need.
This is how my 'metal shop' sits this morning..
2.5 Ton press, bench grinder/wire wheel, sheet metal bender, 2 size drill presses, vice, and various electric tools like angle grinder, drills, etc, and base mount rotary tool, and of course hand tools like snips and benders.
If you can't find a part that works, make one ;-}