By all means send her where you think she should go. I hope that she can keep her cell phone and laptop weren't criteria that you or she were looking for in determining her course of treatment. I do agree with you that there are different qualities of treatment facilities and some are much better than others.
I do not agree with you that she is exhibiting any behavior indicative that she wants to get sober. To the contrary she is yelling loudly that she does not.
If she has a agreed to go that's the best you can hope for. Maybe it will help who knows. Your fiance sounds like she has been coddled and spoiled quite a bit in her 35 years. Having been to the "sub par" rehab I hope that she will at the least feel grateful for what you and her parents are sacrificing, rather than feel it is what she is entitled to, which is kind of what it sounds like.
Good luck with this and I hope she will see the light.