File suit... it IS the right thing to do... even if you might not end up collecting anything... its going to make it that much harder for him to do this again for years into the future. You know the saying... actions have consequences.
Having a collection on his credit report may not pay the damages... but it will give you peace of mind he hasn't gotten off scott free.
And many landlords can and do run credit histories on potential renters to catch those who don't take paying their bills on time seriously, before they allow themselves to become another victim of a deadbeat.
Being poor has nothing to do with being dirty, or a deadbeat. Many poor people take their obligations seriously, THOSE are the people you want as tenants.
