As retired CPA, I find it amusing to read tax advice from those who have no clue. 

I am retired and working on career #2 and 2 of 3 of our kids have left for college - our oldest is headed to UConn for her PhD (6 years) and instead of paying to rent, our thoughts are to do a version of a house hack with buying a house/condo and renting out one to two rooms to offset the costs of her rent.

Then retired the $100k note by giving $100k in Corp bonds to the seller.  

I almost didn't post because I hate to throw in some negativity, but here is a different perspective.You're also inadvertently leaving out people who CAN'T have those jobs, ie retired people and some people with disabilities. 

I would also look at snowballing one property at a time.. get one paid off then the next then the next.. paid off RE is where you want to be if you really plan on using this stuff for retirement cash flow..

I am working a couple other zip codes (38117 - East Memphis & 38122 Berclair) but main focus is 38111.I have done some in depth analysis on my YouTube channel if anyone is interested in seeing how I run my numbers and always happy to hear constructive criticism or better ways to do things.Additionally, later today I will have a video out reviewing "Rent To Retirement" and giving an overview of their site and academy. 

I realized 5 years ago that I would never have enough money for a satisfactory retirement if I didn’t find a different way to make money then my W-2 where I’d never made more than $40,000 per year.

That inspector retired in 2018, and it is a whole new world now.

I buy my retirement funds (Wall Street) all cash.

Terrific article by WSJ writers about what retirement actually looks like if you are managing rental real estate.