Boat Hire Website - Building on the existing web design

C'est ce que BHS Boat Hire Sydney recherchait dans leur web design

Boat Hire Sydney connects boat owners with people looking to charter a boat for their next big event.
There are now over 30 boats to choose from, so I need a nifty filter system to instantly reduce 30 boats down to a small number, based on some user preferences.
I want to use Ajax or similar so that the collection of boats instantly changes in front of you, rather than reloading.

Here is the page we are working with:
http://www.boathiresydney.com.au/c/all_boats

The page should not look drastically different to every other page on the site, so I suggest keeping the entire header section and the blue background but I'm open to ideas.
Your goal is to add dials / gauges / filters / input boxes or whetever way you can think of to allow the user to filter the list of suitable boats for them.
The attributes they can adjust are:
1. Number of guests (overall max is 400)
2. Budget (not exact figures, more like Luxury, Mid-High Range, Mid Range, B… Voir plus