Hawk,
I need to be honest with you.
You need to provide evidence to the ECO that you can support her without recourse to public funds.
As a guide only, the highly marginal case is for you to demonstrate £106 per week of disposable income after rent/mortgage. Bank statements need to support this and normally not show any overdrawn account without some definite written explanation that will be acceptable to the ECO.
Savings will help but your positive proven cash flow is more important unless your have savings that will be sufficient for the envisaged duration.
If you feel your financial standing is weak and you have no steady employment, I would strongly suggest to wait a little longer to a more positive situation.
There's just too much at stake to take such risks that are reasons for refusals on their own.
