I know what you mean. Olafsland, the map I have in beta now is almost 12.5x12.5 . It has taken me over a month to get it that far and will be prob another 1.5 weeks to get the textures right and change any bugs. A map this big would take 4 times as long since it is times as big. That means 4 times the roads and fences
, not me not anytime soon.
The good thing is though is that you may be able to import two premade islands and place them in the water areas, so you could do Malden/Everon on the same map and still have them be separate islands.