Filter engine or search system for joomla by sfpkent

I am using Joomla for my site http://ikomuniti.com. I want to build a filter system or search system similar to front page of http://worldvision.org Please refer to this image - http://worldwebcreator.com/download/filtersystem.jpg please play around with http://worldvision.org... (Budget: $30-$250 USD, Jobs: Joomla, jQuery / Prototype, MySQL, PHP)
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