UK Marriage Visitor Visa Enough To Apply?

[J_blues96]

My fiancée is a US citizen and is wanting to apply for a UK marriage visitor visa but has some problems with the financial support element. It states on the documentation required that you should provide six months of bank statements/payslips. That makes her first problem, because she has only recently opened her bank account and isn't employed meaning no obvious source of income.

She has a power of attorney who has managed the money left to her by her late guardian as well as paid the bills for the house left to her which she lives in with her mother. Can she provide the will stating what's hers as well as the power of attorney agreement showing he has managed her finances and what was left to her as financial support for herself? She could provide bank statements from her power of attorneys account where he has managed this money.

Also into her new bank account she is obtaining perhaps $140,000+ which is money owed on life insurance from when her father passed away. She can give the necessary paperwork to prove this isn't "funds parking." The problem is she cannot provide anymore than one month's worth of bank statements since this is a new bank account, which may render that amount of money useless in the overviewers eyes because they can't see the ties to her local economy they look for. She has dealt with numerous mental health issues and setbacks in life which is why her financial circumstances are what they are in terms of her not working or controlling her money in the past. My fiancée is 23.

As stated above she is also unemployed, isn't a student, so proving ties to her home country will be difficult. Does owning her house count towards ties? She is also close with her mother who lives with her in the house she owns and her mother is dependant on her, and would definitely not overstay because she needs to see her. Perhaps having a power of attorney could also provide ties? She thought maybe he could give a statement of some kind. We also thought maybe purchasing a return flight before applying to show she will leave might help, but the problem is it says not to purchase anything travel related until a visa is approved.

My own parents have also provided a written statement that she can stay with us, and that they will support her financically with the various things she would need. They have given bank statements, a mortgage statement as evidence they own their house, and the balance in their savings account to show they can support her during her stay. I will also support her as much as possible during my study. We are all UK citizens.

Do you think providing everything I've mentioned with a carefully thought out explanation and evidence of her circumstances will make her application successful or should this be done another time, in other words will it be very difficult to have this approved? We have February 17th next year booked for our marriage and really want to be with each other, so I'm hoping there are ways to problem solve here. Thank you for reading and for answers given, it is very much appreciated.