I know the house hacking concept but we rent in a really nice neighborhood and we have no plans for buying primary residence, I was want to start rentals buy and hold for passive income later refi and get the next one ans so on....

We use MINT.com, which is nice.According to MINT, what is largely dragging our credit score down (it's a 758) is credit utilization.That's a few credit cards here and there but predominantly our HELOC is 60% utilized and bringing up our total credit utilization up over 40%.I'm under the understanding that many people use HELOCs as a great way to pull out equity from their primary residence.I don't understand why one would be penalized from having a stronger equity position in their primary residence?

I realize they aren't common in most parts of the US as a primary heating/cooling system, but they are here.  

You don't even have to find "deals" – as an FHA buyer you will probably have to offer more than a traditional cash or conventional financing buyer, but with 3.5% down your returns will be worth it.What is your job/career?

It is in an area that zoning works out (currently mixed use commercial + primary residence SFH) and is 'up and coming' by encouraging density.

Therefore I do not have a set minimum on cash flow but we have never purchased a property with negative cash flow projection but we would consider doing so.Here are two examples of properties that we purchased that cash flow was not a primary consideration:A Duplex that penciled out at about cash flow neutral upon purchase using conservative numbers. 

My spouse and I work traditional  9-5's.

I purchased my primary home 2 years ago and have been living in it since.

or primary?

A better alternative for future low down payment primary loans could be the Fannie Home ready loan.