At the end of the day, you won't make a pile of money, it will cost the developer more money than if they were just reasonable, and only the lawyers will be happy. 

% rate buy down, closing cost seller credit,  lower sales price ?  

.$140k offer8% interest rate20% down8% management fee5% vacancy5% maintenance 5% cap exI haven't gotten insurance costs yet but it's been suggested that I plan for $2k per year. 

No requirement to be in the inner circle other than to get the 100% funding up to 65% of ARV, otherwise it is 90% of acquisition cost + 100% construction costs up to 65% of funding.

I would strongly consider building equity to make a stronger down payment and further decrease your monthly cost. 

The parties will jointly appoint an acceptable mediator and will share equally in the cost of such mediation.

This can put a significant strain on your finances and cash flowThey also often require a large down payment themselves and may have a strict repayment schedule that can be difficult to meet, especially if there are unforeseen circumstances or delays in renting the property or generating income from itIn addition, relying on this type of loan may expose you to higher financial stress and the possibility of default if you are unable to meet your loan obligationsThe final decision depends on your overall financial situation, risk tolerance, and your ability to manage the associated costs and obligations

Can try to reposition to Class B, but neighborhood may impede these efforts.Vacancy Est: Historically 10%, but 15-20% should be used to also cover tenant nonpayment, eviction costs & damages.Tenant Pool: majority will have FICO scores of 560-620 (approaching 22% probability of default), many blemishes, but should have no evictions in last 2 years.

Of course there is also market opportunity cost to consider.

With that said, the income can still offset the cost of holding the property as a long-term investment.