With no idea how much you make or what you have in savings...can't really say.
What does the budget work out to when you plug in all the numbers...you do have a written budget...right....
What is your RV and what condition is it in? What is your DIY abilities?
Can you really count on a job 6 months out of the year? Your skills won't go stale will they? If it involves manual labor, what happens if you lose the physical ability to do the work?
Why too many unknowns to say if you can do it.
We spend about $2500/month and could take that down to $2000/month without really crimping our style much but we are debt free with no house (though we do have a boat we split time on...actually two until we get the old one sold. But that is probably significantly less than what a house would cost on an annual basis.)