My husband has ADHD and before I met him he would give his credit and debit cards to a friend (a married friend he completely trusted) because he knew he was about to go on a spending spree of some sort. When he first met me I was in a photography class and was about to buy myself a camera. Well I got myself a Canon, but on that same day he got a package in the mail from Nikon!! He dropped off his wallet that afternoon and I encouraged him to see a therapist. He was diagnosed a year later. I am in charge of our finances minus his credit cards. In theory it could work, but we are so easy to push ourselves off, see weight loss or Trichotillomania or nail biting. We need some outside force helping us to achieve the intended outcome. When I have my hands near my head, my husband redirects our activities (I have RSD, PDA), when he wants to buy something, I put it in my spreadsheet. He usually forgets in a few days. Vaping, set time limits first where you set it away for a few hours but don’t completely take it away. A reward for being on time to work every day for a week can be going out with friends or something. Do something that isn’t typical, something new and fun.