Sorry for the multi-quote response, I spoke to her about this last night, overall (as there were some grievances) she expressed she felt the same about not wanting to be apart anymore as (due to outside of relationship factors for both of us) it's taking a toll on her mental health. As for what the attorney said, he didn't say it was a 90 day rule but that marrying AND adjusting status within 90 day period shows prior intent to stay (I think that sounds silly).
I have shown her this post due to what people want her to know, sadly the proposal couldn't be special with the 1week restraint I now would have. She says the most recent time she has been to either a wedding, funeral or birth is over 10 years ago, it seems as if that part will also not be an issue lol, and if it is she can choose to accept that risk.
Plus if any of this is an issue for her I'm more than happy for her to decline as it's her life also, but I am posting here asking for the facts for "IF she agrees" as written originally, so that it can be an informed decision and/or process. I truly appreciate the warnings for the legal costs, however looking at the total, it is a lot cheaper than what I expected initially (not cheap, just cheaper) and I can cover it comfortably with my savings alone.
So, would marrying and filing for adjustment before her legal stay here ends be ok? Are there any legal issues to be aware of, and as for what the attorney said, how would we prove there was no prior attempt to stay in the country (that seems like a catch22, how do you prove a negative?). She says her only personal belongings back home are electronics (gaming equipment, TV), clothes and her (sorry my mind has gone blank for the word) personal items (childhood items, gifts from family, objects tied to memories or trips), no car as she doesn't drive and lived with parents so nothing in terms of property. So I'm guessing she can choose to sell/ship whatever she wants if needed.
Thank you again for all the responses so far and apologies for the long text.