So, with all the input on printing a little laser off deep cycle... 

3000 watt Wagan inverter... under the rear seat, passenger side
two 110 amp hour batteries under the rear seat, middle position
[propex heater will be under the rear seat, on driver side]
solenoid or high capacity relay instead of the hella relay, between main and rear batteries
10 guage wire, maybe 8 guage, to the two rear batteries (want a fast charge, but not too fast)
6 guage wire to the inverter
relay between alternator and main sttarting battery
car style female plug, w 4 inputs, between front seats, conected to rear batteries
120 watt solar panel, would prefere flex material, but not sure on availability... 
maybe an inkjet printer for nonmagnetic printing
grow lights and a hydrophonic system