As used in this article, the following terms shall have the meanings indicated:
Any lot or plot of ground used for the temporary or permanent storage, parking or location of one or more trailers or camp cars for a period of more than six hours, and which places are used as a business operated for profit.
Any unit designed and used for living or sleeping purposes which is equipped with wheels or similar devices used for the purpose of transporting said unit from place to place whether by motive power or other means, and without permanent foundation other than wheels, jacks or skirtings.