It is declared that for the benefit of the people of this state, the increase of their commerce, welfare, and prosperity, and the improvement of their health and living conditions it is essential that the people of this state have access to adequate medical care and health facilities and that it is essential that health facilities within each county and municipality in the state be provided with appropriate additional means to assist in the development and maintenance of the public health. It is the purpose of this part to provide a measure of assistance and an alternate method to enable health facilities in each county and municipality of this state to provide the facilities and structures which are determined to be needed by the community to accomplish the purposes of this part. The necessity in the public interest of the provisions hereinafter enacted is hereby declared as a matter of legislative determination.