You could use the bonuses to help pay it off.

What I was getting at is using the bank account funding as a cash advance mechanism (as long as you follow DoC's instructions for avoiding cash advance fees)

Let's say you bought a $1500 Macbook (no idea what the cost really is). You can't afford this. Your cc statement with an extra $1500 of expenditure posts on August 1st, with a due date of August 25th.

Sometime between August 1st and August 25th, you open a BMO Harris account with your credit card and fund $1000. Then you open a Bank of the West account and fund with $500. (this can also net you $350 in bonuses)

Then you take that $1500 and pay off the extra $1500 on your August first statement.

September 1st comes along and you still have an extra $1500 on your bill.

You then open a PNC Bank account and fund with $1500 (or up to $2000, I think). use this for your Septemeber 1st statement.

Then continue for october 1st, or until you can pay it off in full (and the bonuses will help as well!