What this country needs is a proper international airport, not a regional one, something to handle wide-body and the only solution is to up-grade Santo Pekoa with 3200m of new tarmac that was surveyed in 1943 with nice clear take off and landing approach paths.
Why do they need to be able to take widebody aircraft? there isn't the demand, and would just add unneeded cost.
They just need an decent new runway that can happy handle 737s/320s to AKL,SYD,BNE. Along with an simple, modern terminal setup.
Most of the other Islands have been able to get there act together, and worship NZ to fly to them. Yet Port Vila Airport on the other hand