I lived in a 30 foot fifth wheel year round for three years (1999 to 2001) while working in Northern Utah.
My RV was parked at a mobile home park so that made some things simple.
The coach was bought brand new for this purpose it was a KIT Espre 294f with 14 foot slide out.
My trailer was set on handjacks under the frame so it was solid on concrete.
I kept the tires covered, yet they still had to be replaced before the trailer was moved.
Winter temps in single digits were doable.
I did go thru 100 gallon tank of propane monthly however.
Stayed pretty comfortable actually.
Condensation even with one person inside was a problem in Winter.
A small dehumidifier solved that.
I did have an air leak under the entry door that I fought with.
Finally found the right door seal to stop that.
When temps are zero in a 15 to 20 mph wind you will feel the air thru a pin hole.
I lost 2 water heaters due to hard water and constant use.
The water heater was propane only so the pilot light was going 24\7
The water bib to the trailer froze solid and ice crawled down the pipe into the ground the first winter I was in the fiver.
A friend brought a generator welder over to cherry the pipe and get water flowing.
We got bags of cow manure to stack over the water line to keep it warm after that no problems.
Warm weather was of course no issue except when the heat got bad say hi 80's the AC cycled constantly and dried me out so to speak.
Dis-cluding rent for the space I think I spent on average $80-$100 a month for propane, water and electricity.
I rented a propane tank and bought gas from a jobber.
That was the cheapest way for me to go.
A hundred gallons would last over six months in weather above 45 degrees.
Winter of course was a different story.
Other than a few minor things I enjoyed living fulltime in my 30 footer.
The trailer did very well, as a matter of fact we just sold it in April.
Any questions just PM or post!
Regards and good luck!
