Am I doing the right thing?

It sounds like you have valid reasons for the move. I'm not sure that a girl her age can appreciate the concerns. She may focus on staying due to knowing people, familiar places, etc. But, it's very important to have good schools, extracurricular activities, job opportunities, cultural events, higher incomes, and access to resources. Growing up with those thing is a great opportunity. Whereas staying in a depressed community can limit you. I have seen that happen with some of my family. If you don't get out of the town, you are stuck with few options. A lot of kids end up in trouble due to financial crisis and/or boredom.

There is a lot to consider, but I would really think about what your sister might gain. If she wants to move back when she's 18, that would be up to her.

It sounds like you want to move for all the right reasons! Two hoours is certainly not the ends of the earth, and she can kep in touch via email and social media, right?

How does she feel about this?

Its her stepdad and i have full custody of her. The move is 2 hours away from where i currently live. The reason for moving is this small town we live in has nothing to offer me or my children. I want them to have better choices in life. But i also feel guilty for dragging her in a move like this

Is the other parent that you refer to HER stepdad or YOUR stepdad? If he's her biological parent, is he going to fight you for custody? How far away are you contemplating moving, and why? And finally, how does she feel about a majot move?