In Candy Crush, I need an airplane ticket to go to level 36. Is that the only time that I will have to decide to ask my friends on Facebook or pay the 99 cents?
Nah, it won't be the only time. There is more stuff like this later in the game.
One option I did was I played the three quests to pass. It takes longer, but it saves you paying and hassling your friends :p
These actually happen every 15 levels, all the way up to level 500. You even have to unlock something after Level 500, but I haven't gotten far enough to tell you what that unlocks...