It is likely at least 2x too low.There is a lot of misc costs that add up.The 50% rule likely is a more accurate forecast of the cash flow than your estimate.  

Quote from @Yoni Meth: Hey All,I’m currently investing in Columbus, OH, and generally happy with the market, but I’m looking to expand into another area where single-family home prices are more in the $100–$150K range.My criteria:Strong cash-flow potential (ideally close to the 1% rule).Reasonable appreciation upside.Population growth and a diverse job market.Normal/Reasonable property tax rates (nothing extremely high that kills cash flow)Neighborhoods with acceptable crime levels, preferably C and above, avoiding high-risk “D” areasIf anyone has experience in markets that fit this profile, or recommendations for cities/markets worth exploring, I’d appreciate your insights.Thanks!

If rents come in lower, it could affect qualification.• Make sure you’re including full PITI + mortgage insurance.Your net cash flow should factor in principal, interest, taxes, insurance, and FHA mortgage insurance.

one thing that is important to note is that in the first few years of owning long term rentals, there isn't any cash flow. 

With a long term rental, you cannot do that unless you qualify as a Real Estate Professional, which is a much higher bar.You will still get normal depreciation every year, which helps, but it will not turn a negative-cash-flow property into a tax win.

Currently, that house is rented as two doors and cash flows $800 a month.

Debt paydown becomes a wealth-building machine.Even if your properties only cash flow modestly, 10 tenants quietly paying down 10 mortgages for you year after year is life-changing.2.

As long as the numbers still cash flow after the refi, it’s the cleanest path to scale.3.

I’ve seen a lot of solid cash-flowing turnkey deals in cities like Detroit, too. 

Hey Marshall, solid deal profile, especially with the cash flow and 100% occupancy.