As an intermediate to advanced level PHP web-developer and a young one at that (15yrs.), should I build an entirely new CMS for my website or rely on pre-made software such as WordPress or Drupal?
I don't exactly feel that WordPress is powerful/scalable enough to be able to handle what I'm trying to do and after tinkering with Drupal quite a bit over the last few days it just doesn't seem up to par for my liking and also isn't well documented so I'm having a bit of trouble getting it to do certain simple tasks. I would love to use something such as ExpressionEngine, but I don't have the money to dish out for a commercial license which is currently at around $300, so that's a no-go.
I originally started coding my site as a temporary system so my users could purchase upgrades and other things such as in-game currency until I could get a new website up, but after I started on it I quickly realized that I needed to make it scalable, so from then on I coded with the thought of making it a full-functioning website in mind. It only took a couple of days but all of the basics are there (register, login, account modifications, etc.) and I believe it would be a great start for a private CMS.
The last thing I want to add is if I were to build my own CMS, should I make use of a PHP framework such as CodeIgniter, which I have quite a bit of experience with?
Maybe others developers could clue me in as to what I may be getting myself into.