Better yet - use credit card and give 5% more than you had planned!! That should cover the processing fee and then some.
And you'll still come out ahead

Give $1,000 and you get a $50 rebate.
Give $1,050 and you'll get a $52.50 rebate, so still less than $1,000 out of pocket.
And that's besides for the 10%+10 point bonus for checking.