Audiovisual quotes are often the biggest black hole in corporate event budgets. The hotel's in-house AV provider isn't actually "in-house"—they are a third party paying the hotel up to a 50% commission for exclusivity. If you don't use them, you get hit with "patch fees," "shadow supervisor rates," and exorbitant power drop charges. Negotiate these clauses out during the RFP stage, not after you've signed the event contract.