Buying a Duplex with a bonus Mobile home?

[Janelle Hicks]

Hi so I have a situation I hope someone has experienced. We are trying to buy this duplex, about to make an offer based on it's value, but our lender is now sort of hesitant due to the fact that there's an extra older mobile home in the back of the property. Currently the mobile home alone is rented at $900 a month even though it's kind of gross so I do think of it as a nice bonus, but the property I think is worth the price and duplex would cash flow without it. 

In my mind, this is something like asking the seller to throw in the furniture or something- it should not impact the deal. Seller doesn't want to remove it any more than I do. Lender is pushing back. We could make the offer contingent on removal of the mobile home ( it will have to be torn down), but that seems so wasteful. Is there really no option to structure this without having to throw away a perfectly good $900 a month?