Sounds like you are planning a great trip. A rental house, condo, or apartment is a good idea because eating out 3 times a day is expensive and it takes up time. We like to rent an apartment at Den Laman and dive with Bari Dive and Adventure. We prepare some simple meals and eat out for others. I am not crazy about fast food and the nicer restaurants on Bonaire can be pricey. I also have some food allergies so sometimes eating at home is just easier.
I have made this suggestion before to divers looking to reduce expenses on Bonaire, but I have never stayed there personally, but the Plaza Beach Resort is an all-inclusive and the costs include accommodations, all meals, non-alcoholic and well-brand alcoholic beverages, free nitrox, WiFi, and unlimited shore diving. I think the price also incudes taxes, service charges, and airport transfers but I am not certain about that.
I have read both negative and positive reviews of the Plaza Beach Resort so you need to do some research if you are interested. Right now they are advertising $1,100 per shore diver with the option to upgrade to include 1 or 2 tank boat dives, see the link below:
Plaza Resort Bonaire All Inclusive Dive Experience Package - Caradonna Dive Adventures
Other expenses will include: airfare, car/truck rental, insurance, gasoline, marine park fee, tips for the dive shop staff, and the departure tax.
Wherever you stay, security is an important issue. I love Bonaire but break-ins and petty thievery are a recurrent problem so make sure that you are staying on a secure property. Don't just pick a place because it seems cheap.
Another tip, sometimes lodgings are advertised as air-conditioned, but that may just mean AC in the bedrooms. If that is important to you then make sure that the entire unit has AC. Cars and trucks may or may not have air-conditioning so again, be sure to check first.
FYI, the link below is for a recent post of mine about Bonaire and Plaza Resort. Good luck and have fun wherever you decide to stay!
http://www.scubaboard.com/forums/ge...80-where-should-i-go-october.html#post7474623