I use a stanley stacking tool cart from Wal-Mart (about $25).
The base has a 12V 18A battery with a power panel, fuel pump, 48oz airplane fuel tank, and a organizer for small parts.
The second layer holds my transmitters, charger, and Mini-T.
The pull out tray holds my rotostart, glow ignitor, spare 7.2 pack, charger adapters, etc.
The top easy access pannels hold me allen wrenched, screw drivers. etc.