Most people always cry about the prices.Yes guild level up costs a lot and it takes a lot of time to get your guild to max level(it won't be good if all guilds will be max level asap :facepalm:) ,but if they lower the prices it will be more faster and again you are going to cry because you have nothing to do ( BORED ) now go do quests,farm bosses for unity signs for lvl20 now there a purpose to do most/all of the daily quests :facepalm:
And if you want to level up guild fast,try ask other members for support,give some signs,gold and work hard for gp (guild points)