Definitely get out to some meetups asap but also absorb as much info from youtube videos, podcasts, etc.

Copper or PEX are ideal (I prefer PEX since it wouldn't freeze in the winter and bust). 

I'm interning with a commercial real estate investment firm and the owner has become my mentor, I've read tons of books, watched tons of videos, listen to BiggerPockets podcasts, etc. so I feel that I am ready to start seriously looking for my first deal.

Kastle’s Remote Video Guarding enables this by employing AI-enabled video surveillance to trigger live response from a remote Video Operations Center, proactively supporting onsite staff as needed to ward off threats with faster response than guards at less expense.You might be surprised where trouble pops up.

I recently watch a youtube video by Kris Krohn about rentals vs lease option (rent 2 own). 

I did watch your videos.

A multifamily property sounds like the ideal thing for us.

Ideally what you want to do is use funds from an IRA that is giving you single digit returns and roll it into RE to maximize your assets, especially with passive income.

Ideally, you should consider creating an outdoor private space just for the ADU, even if it’s a small uncovered area.

Potentially they would be ideal for the acquisition as well as the construction all in one loan.