Report Abuse If you sell your house and just live in your RV, then you save even more money. The cost per road trip can be a huge negative figure. Say you sell the house for $300K and buy a nice RV for $100K, you save $200K. Do only one roadtrip in your life, and the cost will be -$200K! Even after you subtract RV park fees and fuel, it's still $190+K in the pocket.