Convery Website from Joomla to PHP/SQL

I have a price comparison website for books based in joomla, fully functional and already having around 500 visitors per day. I would like to transfer it to PHP/SQL. and would like to have more user freindly URL's, Meta tags and meta description like a competitors website which i'll inform once i finalize on the developer. I want all the functions included in the PHP site, which are already there in the Joomla. I already have website template in HTML, on which i want the site.