Or do I have to use an application from a company that does background checks?

You will likely get two different answers to your question, and it ultimately stems from your usage of the word "foreclosure".The word has technical definitions, and as JD pointed out, in a sub2 deal you don't have a security instrument that authorizes you to foreclose on the property. 

You get a 4% discount for paying in Nov of every year versus March, technically every month you pay early is 1% but caps at 4%. 

The background is this.

I plan to do the normal background/credit checks, get references for the tenants, etc like I usually do.

Background: I am 22 and bought my first house hack two years ago.

They rant about how they have to do a background check but other tenant has other occupying people there.we also have a a small road that leads up to the properties.

Background and Expertise.

Ask them if they are looking to sell the property in its current condition (they'll likely say yes given the background you shared). 

A link to FilePlace is at the bottom of every page, so it is easy to find.If you have technical issues, send an email to [email protected] and someone will help you.