Use of trailer and mobile units as dwellings is prohibited, except that the Building Inspector may grant a permit for the temporary use of such units for living purposes for a period not to exceed 60 days. Any extension of a temporary permit issued under this section may be granted only by the special permit granting authority after a public hearing. In no case shall a temporary permit or extension thereof be granted unless adequate provisions for the protection of health, safety, convenience and welfare of the people have been made to the satisfaction of the Board of Health, the Water Department, the Wire Inspector and the Building Inspector, the Chief of Police and the Chief of Fire. The owner and occupier of a residence which has been destroyed by fire or other material holocaust may place a mobile home on the site of such residence and reside in such home for a period not to exceed 12 months while the residence is being rebuilt. Any such mobile home shall be subject to the provisions of the State Sanitary Code.