On the surface, the deal seems appealing, but there's a catch: the asking price is $475,000, which is about 18% over the market value (based on comps and DealCheck estimates around $402,000).Details of the DealProperty: Duplex, 2,400 sq. ft., Purchase Price: $475,000 ($197.9/sq. ft.).Estimated Market Value: $402,000 ($168/sq. ft.).Financing Terms: 2% interest rate, with a 9-year balloon.Unit B Income: $2,049/month (Section 8 tenant through November 2025).Unit A Income Potential: Similar rent or higher; Section 8 cap for the area is $3,234/month.Monthly Loan Payment (P+I): $1,386.Cash Flow Breakdown (if both units are rented at $2,049/month):Gross Rent: $4,098/month.Vacancy (10%): $410/month.Operating Expenses (37.3%): $1,376/month.Net Cash Flow: $943/month.Key QuestionsWould you be comfortable paying an 18% premium for financing at 2%, especially in a market where current mortgage rates are closer to 7%?

As Vince said it is a quick guideline and won't work in most places with current interest rates and house prices. 

So someone who lends based on deposits and relationships rather than a broker who would sell your loan.

Often times if you lower the rate, the fees go up and vice versa.

If that's the case, you should be able to rate/term refinance at ~75% LTV with a DSCR loan, and with some interest-only basis, your payment will go to ~$850 (based on ROUGH pricing TODAY).

The maximum fixed-rate period seems to be seven years, and there is generally a balloon payment at 10 or 15 years.

Only place I felt "safe" in CA was on base.

And will you have ongoing maintenance issues beyond your CapEx based on the building's age.I personally would be suspect of this deal.

Hello,I am a real estate investor located to Southeast MA, I own and manage a small portfolio of 23 units and am looking to expand and scale out of state as the returns and market have been quite difficult in my area: due to CAP Rates, specific building class I am looking to invest in, and rising interest rates/minimal inventory, as well as it would be nicer to be diversified and in a more landlord friendly state.  

Assuming a 40% expense ratio, the net operating income at the current income level would be around $19,440 annually and $28,800 after renovations.At a $360,000 asking price, the cap rate based on current NOI would be 5.4%, which is low for a park with park-owned homes and required renovations.