About the 50k, I heard that you'll pay 50k to become official and when you have become official they will return the 50k. Am I right?
When you are ready, you can PM the following application and 50,000TC to a clan mod. The current clan mods are Fish, Uric, Brey, Lightningkid, Hamr and Delaid. If your clan gets rejected, you will get a 30,000TC refund. We don't give a full refund, this means if you are going to reapply, you take some time before hand to sort your clan out.
Also, you ought to read this, it will answer most questions about clans.