Another good source of information on Bonaire is:
www.bonairetalk.com. In addition, I also recommend that you get a copy of Susan Porter's
Bonaire Shore Diving Made Easy. The book is like the diving bible for Bonaire, with a ton of great information.
As far as resorts go, depending on what priorities you have you should be able to find something that fits your budget. If you can get a group of people together, you can rent a condo or pack a bunch of people into a room at one of the resorts for a good bit less than $1,000 per week per person. If you don't have to be on the water or in town, you can also save a good bit of money.
Other ways to save a little money include:
Getting a room with a kitchenette and cooking a few or alot of meals during the trip.
Get sandwich stuff from the supermarkets for lunch.
Selecting the shore dive only option and not doing any boat dives.
I am sure that there are other things you can do, but every little bit helps and packing sandwichs allows you to keep diving!!
Another couple suggestions are:
Loading tanks for your morning dive in the truck after you are finished with your last dives of the day.
Take a picture of the yellow dive site rock prior to or after the dive to keep a record of which site was which.
Sorry for ranting, but I am going to be there in 22 days and I am chomping at the bit to get there!!
Have fun.