Do it! Positive affirmations work all the time(at least for me).
+1 on what Martin said in his opening statement. I moved to the states in 2009 from Chile,with a film degree specializing in production sound.
I PA'd for about a year and a half when I got here not really knowing anyone and always harassed sound mixers about gear and setups etc...I saved up and bought a 442(my first piece of gear)... made a few connections here and there a long the way. Let me tell you it hasn't been a long ride but every year is looking better and better.
Definitely follow your heart on this but also have a plan,it sounds like you do. Be patient, it won't happen over night as someone said in a previous post. Always be willing to learn new things. This place is great for that and you have the best of the best to help you here if you ask nicely. It all works out in the end,if it doesn't then its not the end. Heck I'm moving to Asheville,NC in a few months...wish me luck!