Frustrated cuz my ADHD Husband keeps getting parking tickets

My ADHD Husband has cost us a lot of money since he has racked up about 7 parking tickets in the past 2 years. When we first met he didn't know how to drive so he learned to drive since I encouraged him and got his license and then we finally bought a car 2 years ago. In that time, he has been very irresponsible with the car on several occasions.

We both pay for the car, but I don't have my license so only my Husband drives it. Because of that I expect my Husband to be fully responsible when it comes to all the necessary maintenance and making the car payments on time.

When he drives the car to work, unfortunately to save money on parking he has to park on the street and walk a bit since that doesn't cost us money. He has a very difficult time keeping track of the street sweeping schedule so he has parked the car on the wrong side of the street which resulted in several parking tickets over the past 2 years. I feel like I can't trust him anymore when it comes to being responsible and I always worry that he made another mistake that will cost us more money. Saving money is extremely important to me and I'm rather frugal when it comes to spending. My Husband has never really seemed to be on the same page as me when it comes to money, but he knows that he can't  spend money on unnecessary things so he has been really good with not doing that. He always asks me first before spending any money and we have a system where we only use cash to make purchases (unless we purchase online. We use a credit card for that). The only issues have been related to the car. He also backed into a truck once cuz he wasn't paying enough attention and one of our tail light coverings needs to be replaced cuz of it.

I really am tempted to leave him over this. I have no idea how I can trust him anymore. He prevented this from happening more often by setting reminders to check the side of the street he parks on in the past, but then he stopped thinking about it for some reason. He can set reminders in the future, but how long will that last and will that be enough to stop this from happening over and over again? I feel like I just can't keep dealing with this. We have already been to a few different therapists (none have really helped and they just cost us a lot of money). He is currently on 3 daily doses of 20 mg Adderall which he started on a lower dose 3 months ago. At times, it seems like it's helping, but then when he continues to make mistakes, it doesn't seem like it's helping as much as it should be. We're about to try a coach, but I'm not sure if she'll be able to help that much with this.

Did anyone else here have a similar problem and if so, how did you deal with it?? Am I being unreasonable since I'm thinking about leaving him cuz of this? If I do leave him, I also really worry about him continuing to make more financial mistakes and ruining my credit because he might forget to pay for them on time.