Yes life coaching approach in such cases might be helpful as the person might not be ready for therapy. There will be a lot of denial and problems that the persona might be facing. I appreciate that you are supporting him and looking for help.
Next Steps
See a psychotherapist/ life coach online offline
Health Tips
Working on his denial and making him see issues he is facing can help him start with a new action plan. There are very high chances of relapse but again continuously effort is required in such cases.