You can take the Rover Coaches as it is a local bus company and does transfer to and from Hope Estate. https://www.rovercoaches.com.au/site/index.cfm?display=269976.
Otherwise, there's also the Pokolbin Shuttle bus services available : https://www.pokolbinhirecars.com.au/shuttle-services.html
If you need any help, do give your host a call.