hi imagine.

The sponsor will be you and no body else as you are the husband.

The fact that you're on benefits might make her application difficult. It would be best if you have a job before she applies.

Although you may sufficient amount of savings, the embassy wants to know that your partner won't depend on public funds (maybe for the rest of her life, not just when she arrives) and £12,000 wont really last more than a year with you not having a job right?.

The best way of proving that she wont recourse to public funds is for you to have a stable job of which you have to show 6 months payslips. Which means you have to be working for at least 6 months. Some people have submitted 3 months payslips and were approved their visa, but 6 months is your best bet.