Not fishy at all, these kinds of things happen frequently with the internet now paying such a major role in our lives. Female meets male on social media. They develop a relationship on social media over a six month period. The female doesn't know anyone in the U.S. and would like to visit. By now she trusts him and asks him if he would be willing to show her around, and offers to pay him for his time. Or he suggests she visit the U.S. and offers to be her tour guide and show him around. She takes him up on his offer, but insists on paying him or at least hte costs. I suspect she also planned to visit San Francisco and New York City before she returned home. Those are two places where most of our family and friends from the PRC want to see before returning home while they are here visiting the U.S. The younger people prefer New York City, in my experience.
I think this is an important point, re NYC or San Francisco.
She entered the US in LAX on July 14. Her allowable180 day stay on a B1/2 tourism visa would expire on January 10, 2024, so she will not be missing according to US DHS until January 11, 2024.
That is 6 months in the US. I can't imagine she was going to spend 180 days in the deserts of Southern California. Or was her trip only to see the California desert. We don't actually know when her return was planned for, do we?
If she really only had $3000, she would not have enough money on hand to stay 6 months. DHS would have likely checked this at LAX on arrival and it suggests, to me, that she was planning less than a 6 month stay, and it was likely only in California or maybe Las Vegas, too.
Edited to correct spelling
It would really help put some of the pieces together if a family member or friend knew more about her agenda in regards to how much time she was planning in the area and the other places she was expecting to see. For example, If there were confirmed reservations in a San Francisco hotel a month after her arrival, then a month in NYC on the east coast and no hotel cancellations or communications had been made, it makes a better case to get LE to get ahold of her cell phone records, if possible.
Otherwise, we will have to wait until January 11, 2024 for LE to be able to officially consider her missing, rather than just not currently accounted for.