I would try to scare him into paying first. The lien is the cheapest way to get your money, but could take the longest. Hopefully when he gets a certified letter in the mail it will scare him into paying. I can help give you an idea of how to get this process started, but I live in a different state than you so it might not be the exact same process. The other option is get a lawyer to send him a letter telling him you will take him to small claims court. This might scare him into paying. The lien version worked for me last year. I ended up almost going to court to make the lien permanent, but they paid before that happened.