We use Rentec Direct and really love it.It collects our rent, applies late fees, deposits our rents in our bank account, tracks expenses, screens our tenants, markets our properties, generates forms we can send out for docusigning by our tenants, tracks leases, and much more.  

Best way to avoid crap like this is to collect non refundable earnest money. 

But when I was an agent, learning some basic Python and VBA (Excel) really helped me save time in the process of collecting and analyzing real estate data.I've been working with technology for the last 25 years; sometimes you don't need sexy, you just need a tool that works.It's a sin that, we technologist, fall for often: searching for sexy instead of "this old thing just works" :)

Mainly unpaid collections and a few liens.  

@Clare CuiI would requalify her - meaning have her provide you with unemployment amounts, how long she is able to collect and also how much $ she has in bank just like I would do for a new tenant

They collect your rent, apply late fees,  deposit your monies into your bank account, market your properties, track expenses, screen your tenants, etc for just a few dollars a month per door.  

If the lender defaults, will the fact that I purchased the loan as an individual with no licenses compromise my capability to collect/foreclose? 

Granted you can get a judgment against them if they stay longer, but good luck collecting on it.

Begin by setting up online tools for rent collection, maintenance requests, and communication with tenants.

What's going for New Jersey is we have a lot of well paying jobs, so the rental demand and collected rents and are very high in comparison to many other places in the country.