Even experienced RVers have to take careful steps in understanding how to set up for extreme temps/conditions... and often fail, mitigate the damages, research and implement the solutions. There is a big learning curve with what you are contemplating. I think you should stick to your studies by moving in with roommates on or close to campus (so you won't even need to pay for a car) and leave the rest to those who have the time to dedicate to the learning curve of extreme RVing. I'm really sorry to have not answered your questions but the questions, themselves, would have to be dissected into manageable pieces to even begin to provide answers. For example, just "needing to shovel the roof off" is a can of worms where one little mistake can be a fairly big problem.
