Whenever a person's special assessment and/or real property tax obligation is deferred under the provisions of this chapter, the amount deferred and required to be paid pursuant to RCW
84.38.120 becomes a lien in favor of the state upon his or her property and has priority as provided in chapters
35.49, 35.50, 36.35, and
84.60 RCW. However, the interest of a mortgage or purchase contract holder who is required to cosign a declaration of deferral under RCW
84.38.090, has priority to such deferred lien. This lien may accumulate up to eighty percent of the amount of the claimant's equity value in the property and must bear interest at the rate of five percent per year from the time it could have been paid before delinquency until said obligation is paid. However, when taxes are deferred as provided in RCW
84.64.050, the amount must bear interest at the rate of five percent per year from the date the declaration is filed until the obligation is paid or the date that the obligation is charged off as finally uncollectible. In the case of a mobile home, the department of licensing must show the state's lien on the certificate of title for the mobile home. In the case of all other property, the department of revenue must file a notice of the deferral with the county recorder or auditor.