Dust will end it. Friction from fine particles and abrasion. The train and tracks would have to be shielded. But if you have that, you can make the whole tea

Dust will end it. Friction from fine particles and abrasion. The train and tracks would have to be shielded. But if you have that, you can make the whole team work on the train. It looks like we will be sending robots to mars for decades. Drilling out habitats before we can move people. Or maybe dynamiting out caves to build habitats.