I think it could be a great move for you. I learned to ride when I was 17 and rode at the same barn for 5 years. As years went by, the barn continuously got larger and larger and now is a massive hunter/jumper barn with around 90 horses. I was lessoning with 7 people in a group lesson, and the quality of lessons just went down because they bit off more than they could chew. I was scared to leave because it was the only place I'd ever ridden and I had learned a lot; but when it came down to it, I was paying a lot of money to ship my horse to a barn for an hour and jump around over show jumps. I left and started boarding my horse elsewhere a few months ago, and I couldn't be happier =] It's always a little scary leaving your comfort zone, but sometimes you just need to man up and do what's best for you.