Mo. Rev. Stat. § 206.122

As an alternative to the authorization for an indebtedness provided by section 206.120, for the purpose of providing funds for the acquisition, construction, erection, equipment and furnishing of hospitals and related facilities, including medical office buildings to provide offices for rental to physicians and dentists on the district hospital's medical or dental staff, and for providing sites therefor, including offstreet parking space, and making from time to time enlargements or extensions thereof, the board of directors may issue and sell revenue bonds. The revenue bonds are payable, both as to principal and interest, solely and only out of the net income and revenues arising from the operation of the facility, after providing for the costs of operation and maintenance thereof, or from other funds made available to the facility from sources other than from proceeds of taxation.