I'm not in Florida or America for that matter so don't have a dog in this fight. I did work for Local Government on a remote
island though and abandoned vehicles were always a problem for us. Basically any vehicle that came to the island would die there and as our dump fees
were high, most people just left them on the side of the road, rusting away in the back yard or in the bush. They were not only unsightly but a hazard regards breeding ground for vermin and mosquitoes.
There were ample powers under various legislative authorities to confiscate and remove derelict vehicles (and to recover any cost in doing so) but they were time consuming and frankly a bear to manage once the numbers got high. Most government authorities (in my experience) have these powers but it is no small thing to just take someone's property without them giving permission. The process can be long and it has to be followed to the letter of the law.
The scheme I came up with was to offer an amnesty and have people willingly sign the vehicles over to us for disposal. Because the volumes were high, we got a really good price
from a local contractor to pick them up, drain out the fluids and dispose of them at our dump. Sure it was a cost but it solved
We did this twice and it cleaned up the streets. Then, the existing laws could be more easily enforced and we did so applying fines and recovering full costs without exception or favour. And we reduced dump fees
to the bare minimum to cover costs. The message soon got out and as soon as our ranger
was slapping vehicles with a derelict notice, people would come and see us to sort out what they needed to do.
I know boats and cars are not the same but what it took more than anything was the will to solve the problem.