At Partner Driven, we provide comprehensive support, including funding, strategic guidance, and project management.

I would still recommend not using an FHA loan if you can because of the extra "PMI" payment that lasts for the life of the loan.

They will keep track of that for you and can provide statements. 

I provide my clients with a checklist of essential photos to take, which ensures nothing important is missed.Use checklists and capex estimators to stay organized and thorough.

At the end of the day, it's still technically a Single Family Home with an extra unit to help offset expenses, but not a "true" investment property or legal duplex.Does anyone have any ideas on creative ways to finance building this (besides Refi or HELOC)?

I will add that this is a process that has many rules that are required to be followed and there are serious financial penalties if you make a mistake. do your research and learn all you can and/or find a custodian who provides education as well as an ERISA attorney who can advise you. 

They have to provide these docs to you as a future homeowner.

They provide the bulk of my income. 

Landlords must provide 30-days notice if the rent increase is less than 10%. 

If possible I use that same section to refute the requirement...or provide an alternate path to approval.