When I/my son move out can I rent this unit to 2 college students (that are not related)?

.- Very low appreciation unless there is a large market shift -- major new employer, city takes many housing units offline via eminent domain, a college greatly expands without additional housing, etc.The list goes on.

Quote from @Joey Andres: Some landlords will improve with practice.

Find Brandon's videos on YouTube for the "four square" method of analyzing homes and practice.

If you want to learn more about the practice (and art) of safely and securely finding and funding a PML to see if it's for you, check out my book on BiggerPockets called Lend to Live: Earn Hassle-Free Passive Income in Real Estate with Private Money Lending. 

I’m a math professor at a local college and teach personal finance and statistics.  

It's a side hustle started aside of my employee job and I feel that this is my best plan to pay my 4 kids college starting in 2027 and secure my dream retirement in about 10 years.

Explain in details...I would love to learn about best practices!

@Michael KattouahOne of the few things that I've learned in college that has actually stuck with me is that life is an income statement game, not a balance sheet game.I'll pay you $100,000,000 for a $300,000 house if you let me pay you $1,000 a month for the next 8,334 years.

We take advantage of the higher ROI within the college market, having multiple universities and colleges in our area.