OO loan seems like real long shot. 

Cash out should be used as a 12-24 month loan so that you can buy another property and pull cash out at the next 12th or 24th month mark.At that point you take a portion to pay off or down the first loan and use the rest as a down payment on the next REI.

Use tools like the VA loan for house hacking and your Basic Allowance for Housing (BAH) to cover living costs while building equity.

If you create or fund an IUL instead of paying cash you can then get a loan on the IUL.

My duplex - built 1989, 2,060 sf, 2 bed/bath, 1 year old roof, value if I subdivide (county already approved) and sell each separately $150k each ($300k total)Investor duplex - built 1995, 2,300 sf, 2 bed/bath, 5 year old roof, value around $310kThe investors initial request was for an equal trade and they would pay realtor fees, which I replied wouldn't be equal due to buying/selling costs (recording fees, title insurance, closing fee, survey, inspections, loan fees, 1031 fees, accountant fees, repairs), taxes would increase due to new sale price, I'd trade a 3.75% mortgage for a higher one, and I'm on the 10th year of a 30 year loan so resetting that to a new loan would restart amortization and pay more towards interest.

Option 1: The loan that the owner has is an assumable loan at a 3.875% rate and still has about $265K.

I have 9 loans currently so looking to do a conventional loan on my next depending on that process.

Your loan would be on a different property so no financing on the property you are buying. 

Your answer needs to make sense, and be true.Also refi'ing your current primary into an investment loan also has the potential to be fraudulent if your family still occupies it as their primary. 

Yes, you can “save” interest by paying off a loan faster - SO WHAT?