Sad but just something I wanted to let you know before you decided to get a lawyer or go to court so you don't risk loosing anymore.
Any court case means person has to consider costs of getting to court, chance of win, and then yes, chance of getting money. With self-employed people there no wages to garnish after getting a judgement. But Judgement against someone will affect credit so for most people that is enough to get them to pay up.

For lot of people, a stern letter telling them you not letting it go, is enough. Next step might be lawyer letter. And if that not work, being serve paper to go court, is enough. But if there no money to have, and if credit rating is shot anyway, then can't get blood from stone. It is something to bear in mind. Check how it can be enforced though. Some area allow marshall to go into home and remove items of value to cover judgement.