The fleet will be something simple. The goal is to make efficient air travel without going overboard. There will also need to be the correct aircraft for the job at hand. Since there is one international airport, 4 regional airports, and heliports in every county, the fleet will match to that design network.
Another thing to consider about the fleet is the aircrafts. Kaldus Air will purchase from as few suppliers as possible. Airbus has long-haul aircraft, short-haul aircraft for regional transit, and helicopters for localized transport. The reason for not having airports in every county is this would have unnecessarily add more aircraft when they will likely not get filled enough to support the airport, and therefore will likely rely on the heliport anyways. Every county will need their own heliport which will go into detail of why on another page.