Section 4. The director shall, subject to the approval of the commissioner, prepare and submit to the governor, and from time to time amend, a comprehensive plan for the treatment in public, private, and federal facilities of drug dependent persons and persons in need of immediate assistance due to the use of a dependency related drug. The director, in developing such plan, shall consult with officials of appropriate departments or agencies of the federal government and the commonwealth and its political subdivisions, and private organizations and individuals with a view toward providing coordinated and integrated services on the community level. The plan shall include a detailed estimate of the cost of its implementation and of the extent to which funds, property or services may be available from the commonwealth or any of its political subdivisions, the federal government or any private source.