I agree with @Ned and @Chris   also don't fall for buying any monthly software subscription.   

For example, the areas economically influenced by NYC commuters: Westchester, Rockland, Dutchess, Putnam behave very differently than areas influenced by NY State employees from Albany, or farmers from (not sure?).

.: If you hire a professional PM, they will handle everything and you won't need any software.

Especially on the software stack you are using. 

I'm a big "life doesn't exist on a spreadsheet" guy, but I'd suggest letting the numbers influence your decision rather than the hesitation to let the once in a lifetime rate go.

@Ryan Moyerit's more like 'rent influence' than 'rent control,' right?

Different circumstances, different economies, different geographical areas and different players all have tremendous influence on the success or failure of a strategy , or tactic.  

Dear BiggerPockets community, My name is Dominik and I’m a software developer in my free time.

The bank may have been influenced by the fact that we had previously borrowed and then paid off 2 loans totaling $5 million also secured by single properties (with no personal guarantees).  

I am looking into skip tracing software but I do not yet have a business.