I have accumulated 2 pairs of wheelchair motors, each pair of a different brand, however they seem close in output RPM. So what I want to do is make a large outdoor rover with these 4 motors for autonomous/RC driving over semi-rough terrain. I did a little bit of research and would have loved to do a rocker-bogie system but I can't afford 2 additional motors. So what kind of system would be ideal with 4 motors? would tank drive work with 4 motors or would car like steering be better? Also what kind of suspension if any would be well suited for this type of bot?
These are the max dimensions (space in my hatchback for transporting the bot :) ) 38" by 64" and 29" inches high I know inches are not used by all so here are centimeters 96cm by 162cm by 73cm high
This image should be to scale