If they provide sketchy information, deny their application and move on.

If the unit is in good condition and is priced competitively, you should get at least one application.

They might be a good fit for your situation since DTI isn’t applicable—underwriting is based primarily on the property’s income, not your personal finances.

I re-rented one side of the duplex I have and had 29 applicants just for the one side. 

Also, we require a 620+ minimum credit score for all applicants, and anyone 18+ must apply.

I've recently started building a software application that allows for behind the meter aggregation for both electrical and gas utilities.

One thing you might want to consider is partnering with microsoft and adding a third party app to their office 365 suite of products as they have an accounting arm and many other applications already in play that you could add on just for property management and it would work on their system to integrate everything.

I am currently receiving 5 calls a day for applications.

For example, an experienced general contractor who does significant remodels of nicer homes might choose to go into house flipping because their practical experience is directly applicable.

@Gabriel Dent Depending on your work and savings, it could be worth doing an application with a lender to see what you could get preapproved up to so you know what range you can offer within and then compare those duplexes, triplexes, and fourplexes to where you could rent for the time being instead.