Questions for those who have lived in an RV 4 seasons.

Not all RVs are built the same way. The cheaper ones have less insulation while some of the higher priced ones get more insulation. You could be looking at a 20# propane tank every other night. Bales of straw around the edges give a little more help than aluminum skirting. Unless you get dual pane windows (slim chance) you are going to have condensation and need the dehumidifier a lot. If water and holding tanks are outside they will freeze!! That is where they usually are on TTs.