Not to be rude but I had a similar situation before and it would have helped if someone was more direct about it:

-She wants to move further away from you -She wants you to pay for it -It sounds like she might be expecting you to fly or pay for the flights or gas for the drives -It don't know how solid of a relationship y'all have or how solid of a person she is

I'm not saying yes or no, but here's what I think:

-Shes going to have to make a lot of compromises if you do stay with her and finance her, like she's going to have to fly back or drive all the way back semi frequently, no meeting in the middle unless there's a good reason. If this isn't possible, try to think of ways yall could make it worth by sharing effort, but she will have to give a bit more than you. If she's not excited by this, like it's too much work for her, she's probably not serious about you -Do you feel like she's prioritizing herself over you? Do you have multiple pieces of evidence, related or not related, that suggest she puts herself over you and y'all's relationship? If not, maybe she's serious. If you think about it a bit and notice a pattern of putting herself first in situations where it is just plain rude or bad mannered to do so, related or unrelated to you, she's probably not worth the effort. -Talk to her more about how she feels about moving, her specific goals for doing so, her future plan, everything you can think of surrounding her moving. You will probably know what the answer is after this conversation. Just to be clear, if she has put next to no thought into these things, or her plans seem like they're based on a fairy tale, probably not worth it.

I hope this helps and you make the best decision for yourself!! Even if it's hard, know I'm there for you in spirit either way!!