Leverage: Use leverage wisely to acquire more properties while maintaining a healthy debt-to-equity ratio.3.

Consider cash flow as being necessary to cover operational expenses, maintain healthy reserves so you sleep well at night and help secure the most favorable debt. 

With the numbers you provided above, you will have to ensure you have healthy reserves.

Spending a healthy % for a reliable company can make your life easier and lead to more growth as you free up your time.

Hopefully that upfront diligence plus a healthy contingency budget would suffice to keep me out of that scenario, otherwise I would foresee a guaranteed loss, or underperformance at the very least.

Their fields looked very healthy but a question you can ask them.  

With a healthy growing economy, There is a great opportunity to capitalize while also having cash flow.

I'm not sure about other neighborhoods in Cincinnati but my properties' area (Mt Healthy) just introduced a City Rental Registration, starting 2025, that costs $100.

I am not saying 25% threshold, I am saying they should work or have another solid way of income and can contribute a healthy portion of the rent. 

In addition our healthy balance sheet allows us to pre buy mortgages down to as low 3.75% for our buyers, most builders can not qualify to do this.