Looking at buying a car that located down there and wondering how long a drive it is from Gold Coast and if they can recommend some one to check it over for me before I drive down.

 

It is about 600km from where you are.
Allow 6.5-7 hours from the border in light traffic.
I drive to Sydney a fair bit (3-4 times a year)
I used to make Pennant Hills Road in exactly 8 hours from here. last time it took 9.
There is about 150 km of 80km/h roadworks between Bangalow and The Lakes Way turnoff.