Long term more passive investments are still very doable here, as there are places of SD expanding with increasing values.

Once a relationship with a bank is developed, 10% down is also doable.  

Definitely doable in some markets. 

while great points and doable in CA... you simply do not know the tenant demographic or capacity in these areas of the US>.  90% of these folks don't even have checking accounts..

In the early part of my career as an APM, I thought every deal was doable, and that there was no deal that I couldn't make work.

Is it doable with appreciation and improved rents?

Then when that is done the 1 hour or less a month is doable in my view  and experience only on the most passive investments - private lending & syndications for example. 

If this is not do-able for you at this point in your life, then you should continue on your current path until the real estate income is able to support your minimum monthly expenses and then make the commitment to full time real estate. 

For many years house hacking in NYC has been doable but challenging.   

I stil got to read it all but seems doable.