What do I need to do to avoid any liability/head aches in case of tenant vs tenant conflicts?

@Anthony Wick, what I'm telling you is the standard ACH requirements. 

My tenant got mad after I legitimately deducted $600 from his security deposit for cleaning fee and damaged furniture so he reversed his last months rent on cozy.  I immediately put in a block with my bank to stop the...

Most get paid on pre-paid debit cards but not very many pre-paid cards work with ACH debit for online rent pyments.

Once you are through residence you'll be in a mode of earning way more money doing the doctor thang, so you could decide to go full-on in Medicine and leverage your higher earning potential there and buy "easy rentals", big apartment complexes, or partner with other people and get totally passive returns on your investment. 

The tenants deposit directly into my bank account, use Zelle or ACH.

I just started reading "Alternative Financial Medicine" to learn more about it & other investment techniques. 

I think the ideal would be an ACH auto withdrawal every two weeks.

I hope it hasn't been to much of a head ache.

Maybe require the mother to direct ACH deposit the rent as a requirement of renting.