Pursuant to RCW 80.50.340, ten thousand dollars shall accompany any preapplication request. If the council determines that the initial ten thousand dollars is insufficient to adequately fund the preapplication process, the council shall so advise the potential applicant and shall provide an estimate of the supplemental cost needed to complete the study. In no event shall the study be allowed to continue if the potential applicant has not agreed to pay the cost of the study. Any unexpended funds shall be returned to the preapplicant.