We also have a bank account at a smaller Chicago community bank, but there technology isn't as good to be honest.I think @Jonathan Greene's main point is don't step over dollars to pick up pennies. 

If the software is not simplifying your life or making you more accurate, you shouldn't use it.Software does have extremely helpful features like online payments, marketing syndication (click a button, and your property is advertised on multiple sites), electronic document review/signing, maintenance tracking, and owner reports.

I’ve got her dealing with 8 properties which have individual accounts.

You have he ability to connect multiple accounts if you would like to setup different properties like this.

I am now under the suspicion that their friend, the one who is still living at the property, is the one who created separate accounts for all three of them and did the signing for each individual who is under this lease agreement. 

I would, If in this position, take the equity in the form of a HELOC and purchase a cash flowing asset that would not only pay for itself but pay for the cost of the money while putting cash into my bank account each month. 

Each multifamily building I have has its own bank account.

It seems like anyone can post anything without accountability—very concerning.  

These specialized companies, easily found online or here, will create your company’s SD 401(k) plan.

Beyond real estate investing, BiggerPockets Money has great episodes on how to avoid the middle class trap with your investments - ie how to structure your investment best so that they're not all locked up in accounts with penalties until you're 65.