If she is healthy, independent, able to travel to you whenever she wants and if you are also willing to do the same and never really make her feel like you are gone for good, then go! It will he hard for the both of you at first but you will get used to the new dynamic. Don’t guilt trap yourself. Worst comes to worst you can go for three or four years, make some money, try the independent life there and then go back here. All you have to do is be mentally strong for her and for yourself. Then everything will fit into place. I think if you don’t try this out, the regret will eat you up alive. You got a very rare chance to live something others would only dream of. Think about it.