The Prefecture is enough-)) The cost of a wyvern isn't that high, considering the price-to-quantity ratio... With wyverns, it's easier to gather gold and resources, which can then be used to build a municipality... On maximum difficulty, when you start with nothing, even wood and ore are scarce or non-existent. Building a municipality depends on quickly clearing the area... building a market, a guild, a forge, and then gathering another 5000... sorry, but I don't want to wait that long-))).