Once they have seen the property and are interested, the prequalification and background checks will do the rest of the work in weeding out undesirable tenants for you. 

Which is why it’s generally better to own fewer but better properties in areas that are desirable VS owning many “affordable” (undesirable) crapboxes in the Midwest.

City proper, peripheral neighborhoods or metropolitan area?

It is the perfect home for me (as an airbnb) but it's undesirable to a regular person since it's dated (its a late 1960's home).

The goal is to make money, not to see how many cheap (undesirable) money losing properties you can own.

You already decrease that ability by buying property in undesirable locations.

An algorithm will probably tell you that undesirable property is an amazing "value add" opportunity. 

Do you already have some kind of pre-screening questionnaire setup to weed out undesirable tenants?

Many of us feel that Safeguard misrepresented investment opportunities in undesirable areas. 

Maintenance/cap ex, insurance, if a rental PM, bookkeeping, misc.The fact you have a loan means 1) leverage 2) equity pay down.In addition, there are tax benefits.So I will do some rough underwriting as an OO non-rental at 95% LTV (because FHA has some undesired consequences that make the 1.5% difference in LTV worth avoiding the FHA).equity paydown: 20% (using OP interest rate at 95% LTV and not counting closing costs).