Besides the charter fee for the Mega Yacht, are there additional costs I should budget for?

Here is the example of all obligatory costs for one of the Luxury Yacht:

LUXURY YACHT: 30,000.00 €
APA (Advance Provisioning Allowance): 30% of the charter fee – 9,000.00 €

VAT is included in all the prices.

Megayacht Charter Europe Yachts Charter