If your local municipality has an online court records, go to their website and look up both criminal and civil histories.

Anyone can go to any website of any big box retailer and see how unusual that is.

How accurate are websites like Airdna?

They didn't actively advertiseour home on websites and we had low tenantresponse.

You can snoop around listings by clicking on my website.

With this in mind, doing the market research well is key and I can share with you some tools / websites that i used for my own (for example idealista data or national stats), so you can check in which cities population is growing (just a few), unemployment rates, rent/buying $ per m2, etc.  

Quote from @Charles Evans: There are websites that estimate market rent, but they can be off quite a bit.

Put it in a short term treasury fund while you take a few months to read a dozen books from both the biggerpockets.com and bogleheads.org websites.

It is all on the SEC edgard website. every reg a offering is public record.

I have a hard time visualizing things myself so using Alex has been a god send, here's her website https://www.cheatsheetdesign.com/ It's around $400 for her help and personally is worth it to me just to save my time!