Best educational background/ college courses for real estate investing

[Rochelle Wilkinson]

Looking for input from everyone on what would be strong/ helpful college courses for my son to take to benefit him for future real estate investing. Little background info here.. I never went to college.. my mother was an alcoholic and I pretty much raised myself..literally.. we barely had a meal on the table every night let alone ever sat down to think about going to or applying to college.. at 21 i started a house cleaning business which is very successful.. I am now 44 and recently ( 2 years ago) inherited a 60 unit apartment complex from my uncle ( I was his favorite and he felt bad  about my rough childhood) it was managed poorly by a local company here I have been able to turn it around into a positive cash flow property.. I am still cleaning houses.. and managing my apartment complex.. I am looking to start buying homes near my apartment complex to expand my portfolio.. here is where I need your help.. my 16 year old son is starting to look at college courses.. we had a talk today about earned income and passive income.. i was explaining to him that even though my cleaning company was successful ( 13 girls cleaning over 100 houses a week) that I had a limit to how much i could earn based on how many hours me and my girls could work.. but with passive income it could be so much more.. he is so smart.. and me and my husband both own our own company's.. but I would much rather he get started now with real estate investing than spend 4 years and $100,000 on school loans to not use his degree in his field ( which I see a lot of my friends kids doing.. they go to school and spend 4 years and $100,000 and end up doing something unrelated to their major).. I know higher education gets your application to the top of the pile.. but I want more for my kids than that.. and of course feel real estate investing is the way to go.. I'm starting at 44 I am ok with trial and error... but  for an 18 year old entering college what courses/ majors would be best suited for real estate investment success??  PS.. I gave him a couple of my real estate investment books ( the typical ones off amazon.. rich dad.. how to invest in multi family properties ) to read....