I think in a year you could significantly improve your fluency. Would you cure it? Probably not, but you can improve your confidence and fluency dramatically. I’d probably change my environment as well. We are a product of our environment and hanging around tough, growth minded people will make you one of them. You don’t even need to do a huge sacrifice. 3-4 hours per day working on your stuttering will probably move mountains over the course of a year. Rest of the day you can better yourself and develop a meaningful life. I’ve found when you have purpose, you’ll typically find a way to make things work.