Our city does not allow anything in the driveway or sticking out in front of the house anywhere on the lot without plates. Even RVs WITH plates are only allowed to be there 48 hours. A fellow down the street was willed a 1974 Volvo by his aunt. I don’t know what was in her will, but it has been sitting there since 1984 when we moved here. He has kept the plates up to date, even though the car’s engine must be completely seized up by now.
I would strongly recommend you find a place out of town to park your vehicles, to avoid ongoing problems with the city and your neighbors. Where I live you can park your RV at lots on the city outskirts for a whole year for a few hundred dollars in a secure and supervised lot.