I used a heloc to purchase the first 4 rentals, so $155k of dept is wrapped up In  that until I refinance each property which have already appreciated extremely quickly given the current market. 

Based on a quick look, houses are cheap there, pick one that is crappy and in the best neighborhood.  

It can run buy, arbitrage, and co-host scenarios very quickly and easily. 

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. 

Sit down with your contractor and write up a quick timeline. 

Yes, they will do many things better than you, but some things it's not possible for them to be as attentive and quick responding as you.Also, no one's perfect, so keep tabs on them in general.Regarding holding or selling: why did you buy this in the first place?

There are at least two I found on a quick google search including Central Indiana Real Estate Investors Association (CIREIA) and INDIANA REAL ESTATE INVESTORS ASSOCIATION.

But when you write “scale quickly” alarm bells go off in my head. 

Hi Kevin,I'm a licensed loan officer in the state of Florida, if you'd like to schedule a quick call, DM or email me!

Because it was cash, they reacted quickly.