Full of it (as in the wallet is full of money)

Your motto could be: money doesn't grow on trees, but it does sit in our wallets.

I am 15 years old and thinking about going into marketing, what do you think?

You can try the bussiness/domain name generator

those websites can give you some ideas

http://www.panabee.com

http://impossibility.org

http://www.dotomator.com/web20.html

http://www.bustaname.com/word_maker

I have been making custom duct tape wallets and bags and other accessories. But now I am branching out into making leather and felt wallets and bags and even making cosplay accessories and possibly commission some costumes in the future.