What is the depth of the water and how consistent is it?

Also added mailboxes for box units and new water heaters for both units (plus a new electric meter for the other unit and internet hookup).Apt A (two beroom, one 3/4 bath) rents for $2200 and is occupied.Apt B (one bedroom, one full bath) rents for $1450 and is occupied.The problem I'm facing is with the refinance.

@Miguel GonzalezEvidence of foundation issues or water intrusion would be a concern.

My first question is whether there is any arrangement for water and sewage, and I have many more.

Perhaps your father would be on-board with that toe in the water of REI. 

A pattern has started, and now he' testing the waters to see what he can get away with in the long run, which means you no longer have authority in the relationship.

Quote from @Elealeh Fulmaran: Tough combo: rural, 7 acres, hand‑dug well, unpermitted structures, and minor water damage knocks out most agency and FHA options.

I'm not trying to be harsh, but "forcing" a deal has gotten me in hot water in the past.

Now you may have to get it rezoned , this may take a year or two and you have to fight some neighbors , then you hire an engineer to lay out the lots , roads , water and sewer , which isnt cheap and may take another year or two .

I regularly buy 80-120 year old buildings and the biggest expense I’ve had that was not planned for was putting in a new larger hot water heater in a location where the old one wasn’t quite keeping up.