Buy a tool box with organizers, that can be put in the basement and accessed easily. Then start putting stuff in it.
Cheap set of screwdrivers, all sizes and styles. Can use cordless drill with bits.
Pliers, adjustable and side cutters,
cheap socket set with sockets,
wire connectors, stripper, and crimp tool,
GOOD digital volt ohm meter,
duct/gorilla tape, (i also carried scrim tape to repair underbelly)
good flash light
That's a start, I'm sure others will add in....
Towr: 2007 Country Coach Allure 470 - 37 Sunset Bay Cummins 400 ISL
Toad: 2007 Jeep Grand Cherokee (yes, it has a Hemi)