Parts of this don't appear to apply to the OP as he is renting part of the dwelling and living there.

As far as the OP's situation.  

He mentions laundry income, but that would only apply if you rent a washer/dryer or use a coin-op washer/dryer.He's giving you a fairly detailed list of income sources.

Pragmatically, OP, many lenders understand this gap, and if you share your settlement statement with them, they will at least only be dividing by the number of months you owned it.

I haven't looked at OP's location or listing, but I can tell you I have very good occupancy and not just during the high season.

The OP asked a question as a buyer, so the advice given is for a buyer, not for a seller.

And I think the OP could have problems with friends and family sharing the cabin.

I think sites like Forbes, CNN Money, etc. take a look at this topic pretty frequently, so the OP isn't the only one thinking about it.  

The OP was discussing buying a small multifamily under 4 units, which the 203k would still apply to. 

@Amar Woods  If the property was bought by the LLC outright, it's a whole different loan (commercial), while the OP is using a conventional loan, which is why they're giving him issues.