The total cost of any project authorized pursuant to this act shall be paid from all or any of the following sources:
(a) Special assessments imposed in the district pursuant to this act which have been paid in full prior to the date set by the governing body as provided in K.S.A. 12-6a10 , and amendments thereto;
(b) special assessments imposed in the district pursuant to this act, to be paid in installments;
(c) a pledge of all of the revenue received from the transportation development district sales tax authorized by K.S.A. 12-17,145 , and amendments thereto; and
(d) any other funds appropriated by the municipality.