I did a roof for a friend's contracting firm on a third party's building. This work was part of his contract. Because he was a friend no formal contract was drawn up. He has been long paid for this job but keeps telling me times are tough he will get it to me when I can. He will won't.This happened about four years ago. Can I still collect this money and how? Where would I begin? I am an N.J. LLC so will I need an attorney?