By 'negotiate' I meant more along the lines of 'work with the client to reach their goals'.
Rather than having an abrupt manner.
Experience brings realism.
In my own experience, PMs in their 30s and beyond seem better. This is based on my own experience only.
To the OP - have you really, honestly and truly rung every single agency not just in the hurstville area, but every agent in other areas who also service hurstville?
I would recommend keep trying.
BTW, Hurstville has a high proportion of ethnic chinese renters. You may or may not wish to choose an ethnic chinese PM. People debate the pros and cons of both. I don't wish to enter the debate on that issue at this point of time.