The activities of the authority may be financed from 1 or more of the following:

  (a) Contributions of property, labor, or other things of value from a public or private source.

  (b) Revenues from property, buildings, or facilities owned, leased, licensed, or operated by the authority or under its control, subject to the limitations imposed upon the authority by trusts or other agreements.

  (c) Special assessments imposed by the authority board pursuant to this act and Act No. 162 of the Public Acts of 1962, being section 211.741 to 211.746 of the Michigan Compiled Laws.

  (d) Proceeds of bonds and notes issued pursuant to section 16 or 32.

  (e) Money obtained from any other legal source approved by the authority board.