If real estate traded on a screen, this may be a good strategy.

You get a pie chart of income and expense breakdowns and then you can open up the bullets to the expense or income categories and it is further broken down as far as you have decided to enter categories for your data.Best I found is, this was a 30 day free trial and I just looked to check, it is currently listed as $119 a year. 

I ended taking over the listing and screening tenants on my own through Zillow.

I noticed you have a broken recliner and several bags/boxes of trash in the back yard for several weeks.

Screen your tenants well.

There is much to learn: pricing, marketing, screening, contract law, lease enforcement, late/unpaid rent, property abandonment, squatters, maintenance, tenant neglect or abuse, communication, and 417 other things.Buying a decent property but not managing it well can impact your finances, marriage, sanity, physical health, and desire to invest.

In your case you can always buy broken duplex/SF and create value from there.

From my point of view for event guest screening and security deposits, Superhog is reliable and integrates well for STRs and events, but you might need to adjust its setup for your use case.

Move on and try to screen better next time.

Why fix it if it's not broken, right?