I'll echo everyone else: yes all adults should apply and be screened. 

Bankers will be asking for proof of this filing as you get loans in the future.https://fincen.gov/boi  It's not optional, It was deemed unconstitutional across a few court cases from TX and AZ, making it a national mess and confusing for everyone.

For active investing it is also helpful to have some type of advantage that sets you apart from other investors - that could be construction or rehab skills, market knowledge or anything else that gives you an edge.I was an active investor and didn't really have any of those skills.  

Examine the bottom half from every angle - how much you can make, what else you can get for your money (don't worry about how much you make on these, they are time suck and the lower half of your portfolio)That's a good place to start.

@Stefano Mitrano if it is transferred to LLC they can call the loan by law, and if they have not done it for someone else - would you risk to check if they will do it for you?

Maybe someone else will chime in with better book recommendations.

Let me know if you need help with specific tools or anything else.

I’ve been seeing a lot of that lately and it’s a sure sign that other stuff is messed up/ not up to code as well.

Like everyone else is saying, learn more about the market here in Philly.

I understand you don't need a lot of space, but you are paying someone else's mortgage.I would start with a fixer-upper investment, up to four units.