Just my opinion here,if you have forced air heat to your basement ( tanks, plumbing, ect.) area....you should be fine! Likely the lows in the mid 20’s will only be a small % of the 24 hour period! The RV should be like “heat sink”, absorbing the warm daytime highs, and slowly lose temperatures as the ambient temperatures lower. “IF” a water line is exposed or running in contact with frame directly exposed to ambient temps.....All bets are off!
Todd & Marianne
Miniature Schnauzer's - Sundai, Nellie & Maggie Mae
2007 Dodge Ram 3500, 6.7 Cummins, 6 speed manual, 3.73 ratio, 4x4
2004 Teton Grand Freedom, 39'
2007 Bigfoot 30MH26Sl