I'd also look into a HELOC.Investment property 4 unit with 70% LTV cash out and 740+ credit can get you a convention loan for 3.375% at ZERO points APR 3.483%. 

(we’re being conservative @ $1200 for analysis purposes)Refinance to 30-year conventional after 6-months of tenant occupation (our conventional lender tells us they require the 6-month duration)      - Pending fed action / outlook, we’re using for analysis purposes 1-point and 4.5% for a ~18-month out                  forecast on conventional refinance investment property rates.

Hi Everyone,I'm in the process of trying to refinance on my four unit building from my current 30 yr FHA loan to a 30 yr fixed conventional. 

Conventional is too expensive if any lender would take the risk.

Conventional Loan as a primary residence, with 20% down @ fixed 3.125%.

Conventional Loan as a primary residence, with 20% down @ fixed 3.125%.

If they don't even offer 75%, then seek another lender.And the main reason we want 75% of ARV is because on the conventional loan they will refinance the existing lien AND ROLL IN CLOSING COSTS. 

Can I be added to an existing conventional mortgage on a primary residence?

Conventional Loan with 15% down @ 3.875% fixed rate.

The programs that allow a lower downpayment of 3-5% are going to require that the property be owner occupied for one year, and would also require PMI until 20% equity is achieved (conventional) or for the life of the loan (FHA).