| It's impossible for us to say how much bandwidth a "basic site" uses. Do you not have any usage stats from where they are hosted now? If you at least know the number of visitors you can make an arbitrary calculation as you will also know the size of the pages on your site.
i.e. for a given page the bandwidth used per visit is the sum of all the parts (the HTML page plus any graphics, CSS files etc). So, multiplying this by the number of visits you expect per month will give you the bandwidth consumed by a page.
Ben |