@Brett Sayers This is a very debatable subject, with great points on both sides, but I do think any argument for disclosing you are the owner is to mostly satisfy your ego. You can still show that you are serious about, and take pride in your job as a property manager without disclosing you own the property. In Mike Butler's Book Land-lording on Autopilot he advocates not disclosing this information. It makes a lot of sense. If someone knows you own the property they immediately will know you are the one they need to negotiate with. The chance of them asking a quick question that you do not seem harm in until afterwards are much higher. If they ask you anything you can just say let me talk the owner about that. Then you have time to think it through as you have the meeting with yourself.
There is a reason why the car dealer has the sells agent bring run back and forth to the manager when negotiating a sale. It provides a level of safety for a good sale, and makes you feel like the salesman is just doing their job. The salesman is also at the whim of the horrible owner of the dealership, they are just doing their job. Does that mean that the salesman does not take pride or care in their job just like the property manager? No way.
The argument that you need to identify yourself as the owner so they know you are serious does not make sense. Most of us have jobs at business and organizations that we do not own, and we take those jobs seriously. So why identify yourself? unless directed by the law, or to satisfy your ego, or just weaken yourself in negotiations there is no other reason.