As title states am interested in purchasing a 4-plex, owner occupying one unit and renting the 3 other.

You might get lucky.I'm dealing with my own issues right now as I have a 5 plex that is not nob and tube but is screw in fuses and the insurance company (auto owners) threw a fit and demand the fuse boxes all be replaced with breakers or they will drop me.I'm right down to the wire and they have issued a do not renew order until fixed because it has taken 7 months to get all the paperwork and consumers on board with the update.I have a really good electrician coming in two weeks now that he finally has his permits, parts and pieces, electrical company ready for the work to be done.The electrician warned that he was only doing this because he was friends with my PM.

My brother-in-law owns two FIG four-plexes and is very happy.  

House hacking a 4 plex is what I often recommend to people getting started.

I bought a 4 plex in 2023 and the appraisal district valued it around $407k.

Beautiful views, casino, and you're never bored.

Long DOM nice houses after price drops of 6%+ are attractive, especially if they have full height walk-out 'basements' you can plex.   

I am planning and preparing so I can purchase a 4-plex in a little over a year, just want to know if any of you have some YouTuber recommendations outside of BP. 

Currently, I have a 4-plex in Texas which I purchased in 2020 (FHA loan that is now entirely a rental property) and manage independently. 

I am currently renovating an old house into a 3 plex.