I am not a tax accountant and I do not play one of TV, but I was completing my taxes last night and came across a question. I think I know the answer, but thought I would ask the group to see if someone has encountered this. For AMT purposes, does the interest paid on the bus count as eligible mortage interest? This is a separate question from interest qualifying for deductions on your 1040. In reveiwing the instructions for pesky form 6251 (AMT) it would appear that an RV does not fall under the definition of a Qualified Dwelling (...mobile home not used on a transient basis) and therefore interest on the bus does not count as eligible mortgage interest making the AMT higher. I talked to a CPA friend who tended to agree, but said that he has not come across this with his clients.