My friends mother owned a software company that she sold to retire.

Did you have to program that yourself or is that an available application of IFTTT?

There is an additional fee to submit your licensing application, sit for the exam, then obtain the required background checks.  

Just use the bigger pockets software. 

I wasn't successful at getting higher rent, but I did receive more tenant applications and was able to get it rented faster. 

Yes most mortgage applications have an area that you enter in rental incomeYou will typically need 6 months of reserves for every property you own unless it's a commercial loan or equity loan/line

I asked for the rental application from the two failed tenants and he refused to turn it over as well. 

You could also try using a management system software and collect the payments and pay expenses yourself, on a small building it might be manageable.

Solving problems is really what most of real estate is about.There are courses on buying tax deed properties, tax liens (where applicable) and a few probate courses.

But also keep in mind that not reporting the 2nd on a mortgage application could come back to bite you in the butt, as it would be mortgage fraud.