If they really insist on maintaining YBCG as a jet port, Gold Coast Airport Corp. could do a lot worse than upgrading the runway lighting to a 6 stage omni directional bit of kit. In the last two decades I have worked there, the common experience I receive from the "customers" is that the runway is often the last feature sighted in the reduced vis (SE stream weather)
Failing that....extend the rail to Tweed/Coolangatta and I'll get you a tidy sum for the real estate. ETA 19R at YBBN circa 2007!
Toodles