The general formula is: W2 pays your personal expenses + personal reserves + investing capital, RE investment reinvests into itself until it is an income generating business (and not just a self-sustaining enterprise).

But I don’t believe there’s much fundamentally that can sustain the growth.

Loved the different perspective with a more purpose driven focus, and a long term view that promotes long term sustainable strategy, over short term profit driven mindsets.  

If vaccines fail, we are on the edge of a sustained decline in city life and large cities will get destroyed in due course.

I'm going to let my properties and skill set sustain my passions.

Price downturns should only happen in places with severe oversupply of new builds where the market can't sustain it: even then, the population will eventually grow to fit the additional supply. 

Is it sustainable? 

You need to buy some kitchen equipment, one or two of the good basic cookbooks like "The Joy of Cooking" or Bittman's "How to Cook Everything," and build a sustainable repertoire of 10-15 cheap, healthy dinners with a few variations each that you can put together easily and quickly.Better for your pocket, better for your mental health because it will help ground you, better for your love life because smart, capable people appreciate personal cooking skills in others.The top three expenses of the American household, as @Scott Trench's book taught me, are housing, transportation, and food.

Best of all, it gives you the ability to use hour 9-5 income for what you want to spend it on.My long term goal is for my home to be financially self sustained (this way if anything happens to me my son has free living), and all my living expenses to be covered with cashflow from other properties... this way my 9 to 5 income can be spent on the good stuff. 

We have been lucky enough to find people willing to teach a couple of novices how to make money as well as build a business of our own for sustainable income.