Bright, Keep your focus on your new job. As for the drum set, if you feel comfortable w/him coming to the home and picking the set up, then do so. It's just a drum set and something he thinks he needs right now to take his attention off of himself and his issues.
Keep moving forward.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.