A reef is more than the pretty spot everyone visits.The life support system extends across the island and includes mangroves and lagoons, these are a part of the reserve as well and must be acquired from government and private land holders. You can't just say this is reserve, put up some buoys and start collecting tickets.
The pretty spot on the reef with the colourful fish is like a beautiful rose after its cut its going to wilt and die with out the bush.
Look at this map of The Hol Chan marine Reserve Zone 'A' is the rose, look how big the bush has to be to support it.
Acquiring the bush is going to be the problem!