You can always start running numbers on properties listed publicly like zillow.com or trulia.com.Not sure if you're looking at deals to flip or deals for rentals, but Brandon Turner has a great video on running numbers: https://www.youtube.com/watch?

Check out this video from fellow BP member, @Alexander FeliceWhat To Do When You Reach The 10 Mortgage Limit

About 3 weeks ago, I started researching how to make passive income and stumbled upon the many videos by BiggerPockets on Youtube.

If you document properly with pictures and/or video, it should be clear to a casual observer whether the damage is caused by "ordinary wear-and-tear" or by abuse/neglect.In every case, I personally consider whether I'm able to defend my charges in court.

Whenever you rent to someone, take a video of the premises while you are meeting them to move in.

Check out this link: https://themichaelblank.com/videos/how-to-make-an-offer-on-a-multifamily-deal-in-10-minutes/

They had rewired parts of the house so they could play video games all day.

Depending on where she is on the beginning spectrum, I absolutely LOVE this video by Brandon Turner (not sure if it's a podcast episode), but it's a great start: https://www.youtube.com/watch?

He offered based on my walk through video, flew out to see it after inspection, and is closing with a mobile notary.  

She showed me the video and it was very rusty brown looking.