I work in machine learning and data science.

@Josue R.Real estate investing/landlording is not rocket science. 

In addition, his passions that have decent opportunity to be able to support him (life sciences and environment) both require degrees for the traditional paths. 

Per this NY Times article, the average American knows around 600 people.https://www.nytimes.com/2013/02/19/science/the-average-american-knows-how-many-people.html#:~:text=The%20average%20American%20knows%20about,do%20you%20know%20named%20Kevin%3FPer the US Census Bureau, the average American moves 11.7 time in their life, which based upon an approximate lifespan of 84 years, works out to be about every 7 years.https://www.census.gov/topics/population/migration/guidance/calculating-migration-expectancy.html#:~:text=Using%202007%20ACS%20data%2C%20it,one%20move%20per%20single%20yearSo, if the average American knows 600 people and they each move about every 7 years, that means that the average American knows around 85 people that move in any given year.How many of those moves do you want to be involved in?

I do a lot of teaching and advising my students about their decisions to further their study. (2) We make about the same amount per year in rental cash flow as I do in science.

@Ryan KindelThis is not a perfect science.

Okay, I realize that appraisal is art not science.

Financial forecasting is an inexact science, you have to make assumptions on income, expenses, timing, exit value, capital structure, etc. and then calculate your IRR.