I was wanting to know what is necessary to heat my coach with a external propane source? Is it going to be a major plumbing job? Or can I buy a few connectors and section of propane hose?<br/>The problem I have is that until I head south, I need to keep the coach at 55 degrees and not always there I do not want to run out of propane. My on board propane is 42 gal so I am...