I've used the following assumptions, which I think are broadly reasonable, depending on your asset's location/deal profile:5.5% cap rate65% LTV IO financing @ 3.5%Net Operating Income of $203,500This gets you to necessary equity slug of ~$1.3-1.4MM after closing costs to get to $120k/annually of NCF after debt service. 

Most others have already addressed the issue of what to do regarding the shoddy work and all, but ... the LEAK itself "may" not be in the brick/mortar or the chimney cap. 

You cap is like 5.7%..

Yes, interesting as I know of a lead on a 25 unit in Gastonia class C property listed for $1.45 mil cap rate 6.5 to 6.8% 100% occupied. 30 to 34k annual cash flow 10 year average.

I have used Venmo but it's strictly a cash transaction, they charge 3% like Paypal on CC's and have an amount cap.  

Back of the envelope example:50lots x $400 lot rent x 12 with 40% expense ratio at a 10 CAP = $1.44 mil.

Additionally - for an exit / refinance scenario, is there anyway a lender/buyer would look at a SFR on a Cap Rate valuation, or for SFR are they strictly valued on their appraised value and comps?

I am wanting to know what sort of cabinet styles and finishes last the longest and would give me the most bang for the buck and an idea about flooring. 

The biggest factors in NNN underwriting are vacancy, TI's, and Cap Ex.

Yes but it is capped at 70% LTV.