I was wondering if there are any programs that any of you recommend to becoming a better real estate agent, especially with studying and learning the laws and regulations for the test.

 @Eric CarlstromRegarding taxes, be sure you are not paying too much and that your CPA/tax professional is up-to-date on the regulations.

I do not think they are sketchy is just that they do not go by all of the state regulations and they might charge you a cancellation fee or increase rates more often.

By-right uses are much simpler since they don’t require additional government approval beyond standard permits.Development Standards: Once zoning is clear, factor in the regulations such as setbacks, parking requirements, density, and other local standards.

Ideally, I’m looking for areas with a mix of:High occupancy rates for STRs (Airbnb or VRBO),Solid potential for appreciation over the long term,Investor-friendly regulations on short-term rentals.If anyone has experience with markets that fit these criteria or knows areas where STR is thriving with good investor laws, I’d love to hear your thoughts.

Question 2: Where can I find state or city regulations regarding tree maintenance when the lease is written with gray areas?

Be aware of any local regulations in Emeryville as well.Please make sure your 4plex isn't exempt from AB 1482.

The regulations in Chicago can be quite overwhelming, so I’m looking forward to exploring the opportunities in this area. 

I was looking into the cities regulations and it seems like mid term rentals would work.

Your definition is correct for "legal non-conforming".The "legal" part of "non-conforming" is dropped when it doesn't apply so most commonly people call these units "non-conforming", "finished", "in-law suite/unit", or "bonus unit".Non-conforming: Any property that doesn't meet current zoning requirements.Legal non-conforming: A non-conforming property that was lawfully established under previous zoning regulations and is allowed to continue its use.Based on his posts @Mario Morales is referring to a non-conforming unit.