Haha I was meaning we would all be rich if we didnt have horses!!
Try to find a very good home for him when you put him for sale (ask for references, check where they going to keep him, etc.) and ask the buyer if you can visit. This way you still will meet him AND he'll be helping another kid to learn ride and show. On 14 years old and still growing you'll outgrow him sooner or later. And unfortunately many of us can't afford all horses we want to have/keep. It's a tough decision, VERY tough, so good luck in anything you decide!