Money and Simulator?

No, there isn't many ways to make money, but this is not a great concern, since in the early to mid game you can actually afford to use non-fully-upgraded wanzers when the missions are still rather easy.

Although you will suffer for using not-fully-upgraded wanzers in the late game, you will usually have amassed a huge amount of funds at late game, so money will not be a problem.

I am not sure about the difference, since I didn't use simulators much, but they seem to be all the same to me.