For example, it's completely legal to look for roommates that are only Muslim or only female with no kids.

I'm a newbie here and I'm not sure I understand why it is illegal to disclose public information (all court files are info open to public) - the female tenant is going to have her 5th eviction case in less than 3 years, she is trying to perform fraud, so do I get it right that I have to keep this information to myself and I can't warn potential victims or post it somewhere on the internet if I have clear proof?

The question you answered about being a female investor really hit a chord with me.

Note, I'm a 23 year old female, so I feel that may hinder my ability to come off as a serious professional and landlord. 

She said she's had to call the police numerous times about the lower tenant whom i also found out is also not even on the lease, he's just a boyfriend of the female on the lease, but she's currently in jail on drug charges.

The demographic is overwhelmingly single female.

Currently my area doesn't have a lot of small-multi units on market in an area I'd feel comfortable living as a young female.

Ask several female friends to help you decorate inside and out.

I’ve been house hacking since I was a teacher and now moved up into a software career, so now have more room and resources to dive further into real estate as my way to further financial freedom 

Female but if anything I'd probably be more lenient to an Older Lady just inherently.