For that amount small claims court is a perfect place to go. You act for yourself, no lawyer fees, and bring all your evidence and any witnesses. SCC will also usually provide you with a written "how to" proceed to bring your case to court. Just remember this: even if you get a judgement you may not ever get paid. So get some advice on how to go about placing a lien on his property. When he finds out that you have done this, he'll pay you back the $5K plus any other costs SCC granted you faster than you can say "I refuse to be a victim."