Thank you so much for you reply! You are right, it will look better to concentrate on the rate increase and the fact that he is permanent. He will be mailing me copies of all the paystubs for this year so we will definitely be good on that.
He does have a 401k (even though hasn't had it for long) but we will include that plus the bank statement of his savings which are around $2k. Hopefully this will be enough to suffice. I am feeling more hopeful now.