Well, even as a handicapped person who is grateful for the extra convenience, I think $250 is pushing the boundaries of "punishment to fit the crime."
More than that would seem to be just plain vengeful and vindictive, although I've been royally pissed at seeing some of the blatant violations.
About 20 hours of community service in addition ought to do it.
I'm not 100% sure towing away is a good idea. "To fit the crime" comes to mind again.
Temperate Terry, 230RN