I currently have a single family home as my primary and two investment properties.

I’m on the hunt for my next primary and would like it to be a project. 

FHA loans typically require the property to be a primary residence for at least one year, so he should confirm compliance with his lender.Once rented, he can deduct expenses like mortgage interest, property taxes, maintenance, and depreciation starting from the date it's available for rent.

Hello,Was going to start construction on a two story 3bd 3.5ba 1500sqft primary home and a 2bd 2.5ba 800sqft ADU.  

I think we have the option of taking out a heloc  and begin to invest elsewhere.The other idea , that I was thinking is paying off our primary residence which we owe 425k.

If not, I'm guessing it would be treated as a traditional rental loan, either conventional or DSCR, using market rents rather than the rent in the lease agreement.

We own 10 homes, but all the rest are traditional leases and are also close to our primary home in the Lake Norman area (all w/in 30m).

We were able to get into it with a 5% down primary residence loan.

out of state is more difficult than advertised. do you already own a primary residence? 

A traditional bank will not give a line of credit even if there is significant equity because it boils down to being able to pay back the money.