Once you start building and doing TGPing you will burn way more then 50 gigs, but first learn how to sell.
When you do move to another host always leave the old one up for about a week after you have moved all of your stuff to the new one. By leaving both your old host up and your new host no one will even know that you have moved since the DNS will be good even if it hasn't been updated everywhere yet. Just be sure to get all your files uploaded before changing domain name servers.
When you are ready to move up to a better host check out the one in my sig. They host all of my stuff and are great.
