I guess there must be some allowance provided to the bank to padlock the house, without the buyers consent if the property has been abandoned. 

The only item we had discussed with the PM was regarding the rent amount.Is a PM allowed to make major changes to the lease agreement like this without our knowledge or consent?

And it's 14 days if "the breach of the lease involves behavior by a tenant or a person who is on the property with the tenant's consent, which demonstrates a clear and imminent danger of the tenant or person doing serious harm to themselves, other tenants, the landlord, the landlord's property or representatives, or any other person on the property.."

I discovered that there is very strict federal regulations (google TCPA Oct 2013) in regards to pre-recorded voice messages or "broadcasts" and that you need written consent a.k.a opt-in prior to calling these people.

I discovered that there is very strict federal regulations (google TCPA Oct 2013) in regards to pre-recorded voice messages or "broadcasts" and that you need written consent a.k.a opt-in prior to calling these people.

If the seller is aware you are attempting to facilitate a sale, you are in an agency capacity with the owner's consent.

If that attorney believes you are assuming the loan with the consent of that lender, they may be willing to close that transaction with the modification still pending, not a great idea, but could be done.

ADDITIONAL TERMS AND CONDITIONS OF THIS ASSIGNMENT ARE AS FOLLOWS: -THIS ASSIGNMENT CONTRACT IS NON-ASSIGNABLE WITHOUT THE EXPRESS WRITTEN CONSENT OF THE ASSIGNOR.5.

Under our lease, subletting requires our written consent.  

You need the seller's consent as that is an equity funded obligation you made, not a cash money purchase loan like a bank loan.