The price ranges from typically B$15-30 depending on the length of the tour. If you're good at bargaining, you might be able to get a tour for less. I went solo and my tour lasted 45 minutes or so. The driver took me around the entire community and even briefly took me really up close to some of the residential areas.
This is an absolute must-do when you visit BSB. I found the price to be worth the experience. In addition, the wind on the boat also provides some nice breezes and will let you escape from the heat for a little bit.
This review is the subjective opinion of a TravelPod member and not of TravelPod.com.