A couple of days ago, they took an automatic payment from one of our tenants!

Like I say to everyone, 87-88% is the number for automatic acceptance. 

One mindset shift I would advise you on in the beginning is that what you think you are after, financial freedom, is not really what you are after.

I would guess in the near future you'll start to see meters that automatically shut-off after excessive use.

For example, if the tenant reports their refrigerator isn't working, the system automatically responds with some troubleshooting tips.

Any company that won't show me pricing is automatically very low on my list.

First off, in some brokerage accounts, you can move money around index funds without incurring a taxable event i.e VTSAX to VTI or something or withint a 401k or Roth and completely change your funds much like a 1031 Exchange.Second, 1031 exchange is just shifting money around not avoiding taxes on usable cash. 

If you are in an area where foundations shift (like Austin, TX), the tile will crack.

People on these mortgages had their payments go up automatically with every interest rate increase and saw cashflow completely wiped out.

I would start with reading Rich Dad Poor Dad, it's a good tool as it will shift your perspective on money as well as teach you a lot of tips that helps other wealthy people stay wealthy.