Since this is an FHA Streamline, there is no appraisal, no income verification, no employment verification, no out-of-pocket costs, and nothing rolled into the new loan.

If you have an opportunity presented, and your equity can earn more money in that deal, then I would roll it over.

No studies other than there are none around like I'm looking to build. 20x30 "commercial" storage with a roll up door and walk through door.

I would at least get the permit to build as many units as possible.Then, you can decide to either build, package the whole deal to sell and roll the equity into something else, or refinance and buy something else.

Then, roll the excess into rentals.I like your plan for keeping your exit strategy flexible for each acquisition.

Take it with a big grain of salt - I saw a property tagged with HIGH RISK of HEAT due to a 200% increase of days over 100F in the next 10 years....going from ONE per year to ...drum roll...TWO days per year.

So if you plan on getting into a more active roll in real estate having cash available is very helpful.

Owner Statement, 12-month cash flow report, delinquency report, and rent roll.

There are a variety of ways but you just need to build relationships with clients and get the ball rolling.  

Rent rolls show rents are up to date. 1 unit had lapse in payment for one month.