I made a huge boo boo of trying to do a "simple site transfer" for a company. I do small business web design and hosting, but thought "eh, why not try". The big problem was I am a WP and HTML guy, and the site was Joomla. The amount of Nameserver, DB, MySql, Javascript, css, and everything else errors that came up drove me nuts. And then they decided to blame me for the errors that already existed on their site before I moved it. Just because it sounds simple and you would like to know how to do it, does not mean you should do it.