Buying a depreciating asset when you don't have a steady income seems kind of foolish at first blush.
Now, if you can figure out how to park it for free like camp hosting it might be an alternative. The park we are staying at right now, yea we sold our house without having a replacement, costs us $520 a month plus electricity and propane. So far it has been nice weather and still paid 77 dollars for electricity. Since we are retired we are not in a big hurry and will probably will be going camp hosting after the first of the year. That saves us over 600 dollars a month.
What part of the country do you plan to live? If your in the north east a RV will not be comfortable to live in. If your in the far south almost any RV would work. Cold usually only lasts a few days and then it is warm enough to live comfortably. Around here an apartment would cost us around 800-900 dollars a month for roughly three times the square footage. We chose the RV because we already have it. If I had to buy a place to live it sure would not be an RV.
Lots of options and choices. You need to sit down and make a list of how much you have to spend on the purchase, Then how much a month do you have to spend to park it. Then how much do you have left over for heat. Then compare that to an apartment with a lot more room.