Plugins for Magento Site - EDITED

Hi, we need someone to add the following plugins to a magento site:

- a basic free gallery (e.g. http://www.ecommerce-extension.com/magento-photo-gallery-extension.html)

- blog (perhaps using fishpig integration if I install wordpress in a sub-directory)

(We have currently removed the requests for attribute images and measurement conversion and will look into these at a later date).

Please can you let me have an idea of cost and time duration, thanks.