Or could they legally be added to a lease amendment listing them as "occupants" then whatever happens - the original tenant is held liable?

To amend my comment zoning or planning plans should be a lot quicker and cheaper but building permits should be a lot more that 2 months and $4500

You need the "Lease Amendment Concerning Tenant Change" form - TAR form 2211, as well as the standard application etc.  

If you don't capture depreciation, then the only way to get those 10 days would be to adjust and re-file that return later with an amendment.

There's usually a clause like this:EFFECT OF ADDENDUM: THIS ADDENDUM AMENDS AND SUPPLEMENTS THE CONTRACT AND, IF APPLICABLE, ESCROW INSTRUCTIONS.

If it has been rented for more than two years, it may be worth your while to amend your previous years' taxes, but would also allow you to claim depreciation (I think) and force you to pay taxes on that income (I think.)

Extensions, amendments, second liens, modifications....This was something like the 10th notice.

Should I ask the current property manager to amend their leases with my management company, or have them put notice to the tenants that I'll be in contact w/ them?   

I think there are plenty of places to achieve that happy medium, especially if you are the sort of person who doesn't have to live in an ultra-hip part of the country for either professional or preferential reasons.30 was my "retirement" goal, but I've amended it to "as soon as practical" :) For me, that is $30k+ yearly "passive" cashflow, since I can personally live on that and remove the necessity for a conventional job. 

As far as the constitution is concerned, I think that the eviction moratorium could possibly give rise to a regulatory taking claim under the Fifth Amendment.