It's not only the costs of lawyer that matter in this case. If he wants to win against casino he should find a lawyer who is experienced in such cases and understands technology in order to know exactly what he does and what to look for. To my experience.such lawyers are not so easy to find and when you do, they cost something extra.
Couldn't have said it better myself. At least for the U.S., any litigation matter of this nature you should expect to pay a retainer of at least 1/3rd the first 90 days billing.