Guardianship costs herein my State about $2500. I know the cost is high. but it will help also in dealing with the financial accounts for your daughter, like dealing with your her creditors and bank accounts and student loans and investment funds if any.
The other you can do it by contacting the involuntarily mental treatment officer for so he can file a court order in your city. it is free. Tell the involuntarily mental treatment officer that your daughter is delusional and you think she can be a danger to herself or others. they will help you. Contact the police in your city and they will help you.
they can usually get a court order within a week after you meet with the officer. Someone will need to serve her, so you must not say anything while you are doing all this, otherwise if your daughter knows what you are up, she will find a way to escape.
I understand the way you feel. I have not been able to control my son. I have been paying a family friend to keep an eye on him in California. I also traveled there myself and could not talk to him. he was hostile toward me and left the city, but I kept tracking him until he is now finally in the hospital. he became a danger to himself and others. Someone found him and reported him and I am glad he is in Hospital. Now, I am trying to Conserve him through the Hospital.
Good luck to you and your daughter.