Purchase price: $328,500 Cash invested: $16,500 Bought as my first primary residence during COVID.

The primary variables are depth, soil structure and the need for shoring, rock interference  and setback/travel distance.

Our primary asset protection is that we have a $10M umbrella policy. 

Initially we had this home built to be a primary residence for us & later decided to rent it.

But you will not get the full primary residence exclusion1.

I am declaring primary residence but will live elsewhere as my lender only requires "intent to move in by 60 days" with no proof of move.Three units - $4200 rent income1st unit (3 bd 1 bt, ~1000 sq ft) is currently vacant, previously rented for $1600.2nd unit (3 bd 1 bt, ~1000 sq ft) rented month to month at 1050. can get $1600 as well.3rd unit (2 bd 1 bt, ~800 sq ft) rented for 1000 until April 2025. can get closer to 1200-1300.

My wife and I refinanced our primary residence mortgage

As you know, the reason you qualified for an FHA loan/rate/downpayment is because you demonstrated to the bank that you're going to be using it as a primary residence for the first year. 

He took depreciation on the prop, claimed the kids I’ve had primary custody of, and likely pocketed the returns.I am in the process of trying to engage a communicative/experienced accountant to assist in cleaning this mess up asap and fortunately our amazing bookkeeper of approx 8 years is very knowledgeable and responsive.

Or would you recommend paying off my home first and then saving for the rental after my primary home is paid off?