Property management is no joke- it's hard work and there are HUGE liabilities in addition to the nuances of state and municipal regulations and the ongoing challenges presented by landlord-tenant relationships and communication.

When I started reading the document, I found multiple things that were not communicated with me before, so I told him to add the addendums for the things we agreed on.

Congrats on making the next step and move, just make sure to have what YOUR end goal is and make sure that it is clearly defined and communicated with others.

For now, I would not communicate any further with this person until we can confirm his identify, but I'm 99% sure this is a scam.

I thought i was communicating what Jason Bott says above. 

Any solution is going to need to integrate with the existing remote technology to which you will likely need to attach some piece of 'hardware' to it in order for it to start communicating with the world. 

I'm trying to navigate how I should communicate with them that I am planning to put it on the market. 

The Housing Authority was not helpful at all and had really poor communication.

With a competitive market you need an agent who has good communication skills and can write offers that stand out.

Immediately send written communication to all contacts you have and can find with their company that you are canceling the contract immediately.