If any of your properties are discovered by City officials to be unregistered, you can receive an administrative citation for failure to register; this penalty can cost $100 or more per property.

Sometimes, stepping out of our comfort zone is necessary to discover new opportunities.

And, if you look in the fine print of your Solo 401k paperwork, you'll likely discover that their role is, technically, less than nominal. 

In some instances, it was difficult to locate the source of the high water bill, but ultimately, it was discovered that there was some leak on the premises.

At least when I attempted it, I discovered I could get a mortgage as a non-spanish resident usually minimum 30% down, although it depends for each bank. 

We offered to fix it but with her discovering what the tenant did she immediately pointed the finger at us to make it seem like we knew the tenant did that or it was somehow our fault.WE ARE NOT RESPONSIBLE FOR OTHERS ACTIONS!!

Everything I talked about in the OP was what I discovered.

If you discover one that sounds potentially relevant, and you have not explored it - see if you can still get hold of your accountant before 12/31 and ask them.

The county discovered I was renting out my home and property taxes more than doubled (lost homeowner and two other exemptions).  

In February 2020, the tenants in a unit on a lot she lives on vacated per a 60-day notice, after my mom discovered they've been subletting the house to internet strangers without her consent, violating the lease agreement.