I have put some parts together I ordered. It’s using the 2 nasa wheels but different motors and everything else. It is all powered by a 9 volt battery now. I am getting a case for 8 AA batteries to generate 12 volts and I think more available current. Hopefully, that will increase the torque of the 2 motors.
Here’s some open source plan on how to build the Mars curiosity rover at a cost of $2,500:
BBC News – Baidu’s self-drive buses enter ‘mass production’ https://www.bbc.com/news/technology-44713298