Question is, which majors would be most useful?

YOU get to decide where you want to invest, and there are investor friendly agents all over BiggerPockets and each and every major market in this country. 

Quote from @Mary Jay: My thought: the majority of business owners know nothing about this requirement.

I have been investing for 24 years and have been through numerous major economic challenges.

I recommend starting there as the majority of your everyday materials will come from such a store and they have good return policies. 

Would recommend 6 acres up to 15 acres.Stop by the Building/Zoning department. 

If the goal is simply to better understand the commercial landscape, values, and happenings, skip buying any course and start subscribing to the Business Journal for your closest major metro.

Quote from @Steve Majors: Looks serious to me, but repairable.

The city's diverse population and economic stability, thanks to major industries like logistics and healthcare, also play a big role.Memphis offers attractive rental yields and a vibrant cultural scene, making it a great place for both renters and investors.

The accounting side;An option is to open other accounts in the master's name and give that account a department name, A, B, C, etc.