Recognizing both the need of every citizen to receive the best behavioral health services that the state is able to provide within budgetary confines and the disproportionate ability of counties to finance behavioral health services, the state behavioral health authority shall designate regions and be responsible for establishing regional behavioral health centers for all areas of the state. In the establishment of regions, primary consideration will be given to natural population groupings and service areas, the regions previously designated for the establishment of other health services, the behavioral health needs of the people within the proposed regions, and the appropriate maximal use of available funding.