OP not sure what your missing and the degree to which your missing.   1.  

The downpayment and closing costs would be one large hurdle in order to repeat this, I'm not sure how willing lenders are to allow 3 properties a year.

Don't be so quick to indebt your paid off townhome until your learn creative financing and review all your options.

I was just talking to someone yesterday who was actually coming across the same issue, not sure what you're looking for exactly but if it'd help to go through some ideas happy to share!

This is a nation wide issue but just want to make sure you realize.

Trying to make sure seller isnt pushing this seller financing without us knowing something they do.

I’m here to network with as many investors as possible—whether you’re already using creative financing or just curious to learn more.

@David Cherkowsky, the lender will take the full rental income reported on the tax return, for that property, subtract it from the total expenses, add back depreciation, property taxes, mortgage interest, home insurance, HOA(if applicable), sometimes repair expenses(must be documented), divide it by the total amount of months the property was in service for that year (THIS NUMBER IS ON YOUR TAX RETURNS, SO MAKE SURE YOUR ACCOUNTANT DOES NOT PUT 12 MONTHS), and subtracts it against your total monthly mortgage payment.

I agree with the notes above but will also caution you to make sure you're very conservative in your underwriting for the multi-family properties with more square footage.

You will learn on it.