I am so sorry to hear of your troubles. From experience, there's nothing worse than something like this happening in your home, where you can't get away from it because you see it every day.
You are to be congratulated on pursuing the matter and not letting yourself be taken advantage of with unacceptable workmanship.
Unfortunately there is a tradition in some parts of the building trade that whenever these confrontations in the courts come up, the contractor can decide to 'cease trading' and re-open trading under another name the following day.
You suspect he may say he doesn't have any money. Would you settle for him re-doing the work properly or arranging for the work to be done satisfactorily? In which case that might be a way to negotiate and get you some satisfaction. This could be done through a mediation service which doesn't involve the continuing costs of solicitors and might mean the contractor would stop being evasive.