The OP is using the mobile home/RV as a primary residence folks so all of these '2nd home' posts do not apply. No one addressed the question at hand. Don't think the interest can be put on schedule A.
You have to pay a lot of mortgage interest/real estate taxes/charitable giving these days to be even be able to write off your RV interest, like over a grand a month for a joint return. The tax benefit then applies to anything over that. Only one third of tax payers pay that much and actually use the Scedule A amount these days, vs the standard deduction.
