Yes, No (it actually gets more expensive as the game progresses.I once paid over 1500 presitige and 1700 gold for a duchy), and it's not all that bad. Prestige counts toward your ultimate score, gives a bonus to some interactions and diplomacy options, and unlocks some event responses. You can buy it with grand tournament, hunts, feasts, and festivals. You get a per month prestige income based on holdings and titles. You get a prestige award for winning the claim war anyway.
Scroll through the vassals list and hover your cursor over the portraits.
i seem to be unable to make him court jester. is there any place i can see if soemoone already is?