Children, children - no need for a slanging match.
The major problem for both Our Airline and Solomons is that neither have the money, nor the credit rating to just go out and lease a 737-300, or even a Twin Otter. One of you is right in saying that there are airplanes to be leased (but not very many which is a problem in itself when it comes to getting a good one); the other is just as correct in suggesting half a million would be the opening price to go get one and get it running. Add another half million by way of a lease bond. Or pay about 10 million in cash for a clapped out 300. Much, much more for ETOPS and who would support it anyway? More money up front if you dealt with Qantas or Air NZ for ETOPS support.
The small Pacific Island nations do not have, and have not for many years had, the sort of money it takes to run an international airline. In some cases, the major reason they are bankrupt is because of their attempts to run airlines. Nauru being a classic example. Domestic operations in those countries that need it - like Solomons - should be in private hands, as it is a given that anything Government is inefficient, corrupt and incompetent. Private airline ownership may also be corrupt, but at least it usually works.
Pacific nations won't co-operate with each other - still too tribal. So while Sale expresses some noble ideas, a joint Nauru/Solomons airline will never happen.
Pacific Blue is their only reasonable chance at an international service, but it does mean they have to swallow their pride and accept foreign control of their air route rights.