Currently it is around $200 per month for casual 24/7 wear (Megamax at night, Abena M4 during the day, Real-fit when exercising, plus GN bed mats for nighttime leaks). I have no medical reason to wear, but I do wet involuntarily at night and can't hold it very long during the day without genuine accidents.
I also spend about $100-150 per month for abdl specific products and activities such as goodnites, vintage diapers, baby diapers, baby shampoo, sippy cups, crayons/coloring books etc. By far this is my most expensive hobby or activity.