Here's a link to the current rental properties in Port Macquarie :https://www.homely.com.au/rent/port-macquarie-hastings-mid-north-coast-new-south-wales
You can set up an alert for Port Macquarie so you'll be notified via email when a new rental property is advertised. If you click on the 'alert' option you can select the suburb, amount of bed/bathrooms etc as well as a price range so you're only notified when something suitable comes up
Hope this helps :)
Your best bet if you're coming here is to look at share housing or rooms to rent.