I did clearly mention the application criteria where I have minimum credit score required.Am I overthinking? 

To get the best results and to start to make real connections, go to local real estate meetups, start learning, and then post a question where others can hop in and help you move from A to B.

Where is your competitive advantage in those areas?

Read the part in your contract where it discusses "default"

Is there a case for building climate control in the scenario where the nsrf mix is 3 for cc & 7 for non cc (10 total)?

(Max vacated rents - your monthly mortgage payment) = +/- net cashflow.On the other hand, you could also look into multifamily units where you can live one of the unit and rent out the other vacant units with as little as 5% down payment.

A tenant damages the property where the expense is $1500+.

And I need some clarification from those who are section 8 landlords.Regarding the actual payment to landlords, they said, "Once it passes the inspection and rent comparability (this is where we make sure your asking rent is the same as the market), the housing specialist will give the move in approval."

The response I received from the PM was that it's due to recent legislation where she's seen "professional" tenants take advantage of recent tenant protection laws that allow them to stay in the property without having to pay rent for the term of the lease. 

Usually you can come to some reasonable meeting point on credits, where it's unlikely they give you the credit for an entire new heating system (let's assume the heating system condition was factored into the pricing of the home) but can get you close.