[WeBeFulltime]

I am not an expert on winter RVing in the north but I think if I was working right next door that I would leave the ceramic heaters running especially if I was not paying the electric bill. I would just make sure nothing combustible was within 12-18 inches and on stable floor. I would also not worry about propane as you stated you have 6 30 pounders and employer is paying. I would also reconsider getting a large tank. Surely you do not have a road that close to both sides. Keep the 6 30 pounders as backup while waiting delivery.