Any court judgement for back rent or payment owed will affect the tenants credit report. Just make sure you watch your own credit report. My judgment accidentally went to my credit report and it took me 2 months to get them to remove it from mine and apply it to my ex-tenant.
If you can prove the tenant is working, you should be able to garnish wages. If you can't, don't expect to ever get any of the back money. Tenants who don't pay now will most likely never pay without being forced.
Sometimes, two or three years later, an ex-tenant deadbeat will come out of the fog and discover he can no longer rent, buy a car or even a home when he does finally grow up. This fact is further driven home by the bad credit of the deadbeat women he takes up with and can not push his purches onto their credit. So, this tenant will sometimes contact a landlord who has a judgement agains him and offer to "settle." The idea is he can offer a lesser amount and victimize the landlord a second time. Be ready to say no to this kind of arrangement.