Thank you all so much for the thoughtful responses and advice. I really appreciate everyone taking the time to share their experiences and perspectives.
@garebear397 - Your experience is incredibly helpful, especially since you were in such a similar situation. The timeline and process you outlined makes a lot of sense, and I hadn't really considered the i407 route as being potentially beneficial for future visa processes. It's reassuring to hear from someone who's been through this and doesn't regret the decision. The point about proving she's been following the rules is something I hadn't thought about.
@Moda25 - You raise a great point about the green card requiring presence in the US. That's definitely something we need to factor into our decision-making.
@Dashinka - Yes, you're correct that March would be the start of the 90-day window to file the I751. The DCF option for a potential return is good to know about. It sounds like the i407 route really is the cleanest path forward if we decide to move.
@mam521 - You're absolutely right, and I appreciate the reality check. This is definitely a decision we need to make together as a partnership. The position would be for a minimum of one year but could be indefinite if it works out well, and we've been discussing the Australian visa situation for her as well. We're still in the early stages of exploring whether this move makes sense for both of us - not just professionally for me, but for her life and career as well. Her perspective and happiness are just as important as the career opportunity. It would be dramatically closer to her home country which would allow her to easily visit with her family much more often than she can now living here in the US.
This has given us a lot to think about and discuss together. Thanks again for the guidance.