The knowledge needed is real estate principles, real estate law, and real estate finance.

A lot of what people on here tell you to do is what also gives Landlords a bad rep and often causes cities to change laws that limit Landlord abilities.

In a similar but smaller scale situation I had my real estate attorney reach out to the law firm listed as the LLC's representative (this was for a single unit not whole buildings) and it turned out the owner was letting their kid live there and didn't have interest in selling for that reason but I felt it was worth the tryI hope to hear more updates from you @Cole Barthel !!

Evictor Denise Holiday is one of Arizona's best law firms/attorneys for landlord representation and or eviction.

We have been flipping for about 10 years in U.S and we definitely understand that there may be many rules, laws and regulations limiting the ability to flip for a profit worth the effort.

Duplex can always add additional units via the ADU laws. 8) Related to number 1, purchasing a property with an existing ADU is cheaper than buying a property and adding an ADU.

I know there is a new tenant protection law but the waiting time is extremely unfair to landlord.

The key with befriending players making it happen is leading with value, expecting nothing in return and sooner or later, the law of reciprocity will kick in and they will feel a need to help you. 

For anyone paying attention, the state rent control law has effectively put in a floor on how far behind market rates you can be without losing equity (in multifamily).  

We have super low property taxes and insurance (about $2k/year combine), and we have landlord friendly laws.