For the purposes of this article, public agencies may enter into one or more subsidiary loan agreements with a county board to facilitate the financing, acquiring, constructing, improving, enlarging, expanding, equipping, providing, operating, and maintaining of hospital facilities located within the jurisdiction of the county board and pursuant to the subsidiary loan agreement may operate, repair, and maintain hospital facilities and pay the costs of the operation, repair, and maintenance from any funds available for the purpose and the payments required for the operation, repair, and maintenance. However, in making the agreement no county may obligate itself except with respect to any security pledged, mortgaged, or otherwise made available for the securing of the bonds and the application of the revenues from the subsidiary loan agreement nor incur a pecuniary liability or a charge against its general credit or its taxing powers.