Will the source of the money cause me to get a higher interest rate than what I otherwise could qualify for?

If you want to do BRRRRs, it's probably better to stick to B or better neighborhoods, as they appraise better and have a higher likelihood of getting your equity out!

He explained that since my loans were fairly low interest like yours that the money could be better deployed elsewhere to generate a higher than 5% return I was getting by paying off the loan early.

I also question your stat on investors having higher sell rate than OO.  

Columbus has ranked on the top 10 markets that outline that for the past 6 months at least. the best place to buy new builds is in higher priceopint markets but where the costs haven't gotten out of control. besides that I'd recommend working with a vertically integrated land development, real estate development, and new construction firm or design build firm who also understands market conditions. 

As someone in the greater Orlando market the cashflow numbers work the closer to the hood you are but I've been noticing a much higher vacancy rate at "market" rents. 

., but if the buyer can show me they have deals, are serious, can speak the lingo, and have capital, then they will have much higher rate of successGino

You buy in these expensive markets because you have a higher loan buy down and better appreciation.

With recent rate drops though I have notice that competition much higher than a couple months ago.

@Faris Wright to me there are two investment types when you go out of you are either Investing For appreciation or cash flow if you are invest on either Coast most of your investments will be appreciation based since the cost is much higher than the rents.