I have a website running on Joomla and I want to change the Gallery page

General information for the website: Garden Design business
Kind of development: Customization of existing website
Num. of web pages/modules: 1
Description of every page/module: We want a new Gallery page that has an Index of each of the projects we have completed shown as a photo with some text and then the ability to click on each picture to open a gallery of the pictures from that particular project. Something a bit like this http://www.landscaping.co.uk/landscape-design/portfolio-en/ but with just a portfolio of photos in the second level for each project.
Description of requirements/features: We would also be interested in alternative hosting options for www.thegardenpartners.co.uk
Extra services needed: Hosting, Customization
Extra notes: