Problems financing 2 buildings/separate dwellings on 1 lot?

[Tim P.]

Property:  3BR single family house with a separate 2-car garage + 2BR apartment above.  2 separate buildings only a few feet apart on 1 land parcel.

I am buying this property as an investment with 25% down payment and don't expect to have any problems. However when I sell in the future, can this setup (2 buildings on 1 lot) present a problem for a buyer who will be an occupant of only 1 building and who will be putting down small down payment with FHA loan?

Thank you!