Enthusiasm is crucial however, I would say you will work an 80 hour week. Just let them know that in crunch time you will rise to the occasion but you should never be putting in way more than is expected unless you are directly paid for those hours. Have a life and enjoy the lack of responsibility when you land the job. It'll pile up soon enough as you prove yourself.
As for advice to get the job, my experience was that you have to be open to move. My experience was basically searching local job ads in the areas I was interested in and found those which I had to contact directly. Take initiative to know about the company you are looking for and then be confident in your ability once you hit the meeting. You are in the situation of not being too tied down so don't make hard core concessions such as 80 hours weeks right off the bat, look for the good deal and find something you love to do.
Oh and make sure your resume is is triple checked for spelling and grammatical mistakes, something I will not do on this post