OK with only 7000' of runway they might not be able to go very far, but surely at least a 767-size aircraft (so 787?) could happily do trips as far as Adelaide out of Richmond? Keg??
With 2000m, we could probably do PER depending on the temperature. Wellington was shorter and we'd quite easily do WLG-SYD without too much wind. Not sure what obstacles exist that may make it a bit harder with an engine failure at V1 but presuming nothing significant then RIC- anywhere on the J curve would be easily doable on the 767.
Realistically though, RIC is not a solution. Any government that tries to make it a solution to anything related to civil ops has just demonstrated their complete incompetence with anything more complex than 3rd grade maths and should be dealt with appropriately at the subsequent election.