This would be in central Jersey which is still a hot market as a result of record low inventory.I am planning to do this strategy since I want to put low money down (10%) on a construction loan and achieve a quick build to lower my holding fees. 

Find out what they offer as far as education and support, what their fees/splits are and what their expectations might be.Remember, you will need a certain amount of continuing education hours, and you will want a Brokerage that has the support you need to help you through your contracts and answer questions.

On the 15th year, the investor and I will discuss together whether we want to sell the house OR continue receiving cash flow.

I wouldn't recommend setting up an LLC out of state if you are buying in Tennessee unless your tax advisor is looking to help you on strategy.. but from a numbers standpoint, it really doesn't make sense when you start adding up on all of the annual LLC reporting fees from different states and then it starts cutting into your cashflow.

That information was stated to establish what I thought is a relevant trend to the discussion that inevitably follows it.

A cash-out refi has closing costs, and if you sell soon, you may not benefit enough to justify the expense.Also, remember that doing a VA cash-out refi will reset your loan terms, and you’ll still pay realtor fees if you sell.

There's a good chance the issue(s) you face has already been discussed and answered.Ask questions in the appropriate forum.

Use the magnifying glass to find blogs, podcasts, and forum discussions on just about any real estate topic.💬 Ask in the right forum – If you’re looking for financial advice, head over to the Finance, Tax, and Legal forum.

We typically also do pre-listing inspections, which i can discuss more indepth with you; its a great aspect of my listing service package. 

Vetting tenants on my own to avoid paying broker fees is the way to go