Contact a lawyer to specializes in elderly or people with memory issues and ask them what their thoughts are.As for why the property was sold, that is a decision up to your mom and whoever she gave power of attorney to. 

Tax techniques include depreciation, mortgage interest, costs, cost segregation, and tax-deferred growth.

It's great to hear that you've been diving into real estate books—knowledge is such a powerful tool in this field.

Subject to, wrap around mortgages, lease option, straight options, are strategies and or techniques utilized to enable real estate transactions.  

Quote from @Bobby Burris: Here's a guide that describes what good cash flow looks like and how to analyze a property.https://www.biggerpockets.com/blog/rental-property-cash-flow...Read a few books on real estate investing to learn the power of leverage.

Your debt to income ratio will be negatively impacted affecting your buying power/ ability to get new loans.

Powerful, grounding, responses here.

Tim Gordon Hey -- more power to you.

I'm not sure if this is acceptable in your state, but an example might be; the master would be Heavenly Homes, Series LLC, filed as required and obtain a certificate of good standing, tax ID number, etc. for the bank account....Then, "Heavenly Homes Series One LLC" file it with that name, it has a tax ID, certificate of good standing, etc. take that to the bank show the Operating Agreement for the powers granted to those members. 

The submeter is accurate and tracks usage of anything powered on in the unit.