Could this happen?
Could *what* happen, exactly? Info in your OP is a bit sparse, to say the least...
too little information
Yes. Cocker Spaniels *can* poop on your lawn.
What? It's no more random than the OP... ;-P
I'm not sure that Tesla allows mobile gateway installations... I'm pretty sure that's not possible...
However, there are numerous battery systems for RVs out there.