council permission, police, trading standards, and if there is someone else on there you may have to buy the pitch off them, to be truthful its a bloody minefield.
but that does not stop the chancers
most of my extended family are in mobile catering
believe me its not easy
the main stay my son in law did not have a holiday for years, up at 3or4 am every morning including weekends, finding a site is not easy, if you are thinking that a couple of days sick will not matter, think again someone...