It was an interesting arrangement honestly.

What is the economic arrangement of the deal?

Is there any way I could pursue this deal and work out an arrangement with seller to get one of the units vacant (for example paying for tenants relocation costs)?

Additionally, this arrangement allows you to maintain access to the cabin for your own personal use.However, before moving forward with this idea, it's important to consider a few potential issues.

think about it: if you can put 3.5% down AND figure out a way to defray your house payment with some kind of house hack arrangement, you keep more cash in your pocket for other things: savings, other investments, whatever you want. 

You might choose to add a specific limit within your lease just to make it clear what the expectation is, but again its very hard to police something like this and of limited value as long as the rest of the tenancy arrangement is going ok. 

One way to avoid lending issues is to be a partner in a project providing money inside the business entity, endless arrangements can be made as a partner.

We’ve got to figure out her living arrangements pretty quickly so I wanted to hop on here and see if anyone knew any agents or properties in that area.

Are you looking for protection for the current arrangement or are you looking for a new arrangement?

@Robert FowlerAs with any real estate agreement, Seller financing arrangements should be detailed in writing to ensure that both buyers and sellers understand their responsibilities under the contract.