His goal is to diversity his money as he's been very successful in another business.

Diversity is great, but the fundamentals for real property are too strong in my opinion. 

Overland Park, KS vs Kansas City, MO) Very landlord friendly, worst case eviction is usually 8 weeks + $500 + lost rent (cannot comment on individual cases and this is not legal advice) Large diverse metro area - variety of jobs, companies, people can have a career in KC.

The city’s diverse economy, which spans transportation, healthcare, and education, provides a solid foundation for long-term growth.

Population growth, job diversity, and low DOM (days on market) are significant indicators.

I have a pretty diverse social group. 

I have been investing in Columbus since 2017, and I have a diverse portfolio that includes residential, warehouse, retail, and office rentals.

It is not "one over the other" but its more about having a diverse portfolio.

I think diversity is great in a portfolio but so is scaling the area you are currently doing well in.

With a large and diverse population, there’s a steady demand for rental properties, particularly in the affordable price range.