(1) Transfers in trust of any estate in real property as defined in section 45-1502(5), Idaho Code, may hereafter be made to secure the performance of an obligation of the grantor or any other person named in the deed to a beneficiary. Where any transfer in trust of any estate in real property is hereafter made to secure the performance of such an obligation, a power of sale is hereby conferred upon the trustee to be exercised after a breach of the obligation for which such transfer is security, and a deed of trust executed in conformity with this act may be foreclosed by advertisement and sale in the manner hereinafter provided, or, at the option of beneficiary, by foreclosure as provided by law for the foreclosure of mortgages on real property. If any obligation secured by a trust deed is breached, the beneficiary may not institute a judicial action against the grantor or his successor in interest to enforce an obligation owed by the grantor or his successor in interest unless: The trust deed has been foreclosed by advertisement and sale in the manner provided in this chapter and the judicial action is brought pursuant to section 45-1512, Idaho Code; or
(2) The action is one for foreclosure as provided by law for the foreclosure of mortgages on real property; or
(3) The beneficiary’s interest in the property covered by the trust deed is substantially valueless as defined in subsection (2) of this section, in which case the beneficiary may bring an action against the grantor or his successor in interest to enforce the obligation owed by grantor or his successor in interest without first resorting to the security; or
(4) The action is one excluded from the meaning of “action” under the provisions of section 6-101(3), Idaho Code.
(5) As used in this section, “substantially valueless” means that the beneficiary’s interest in the property covered by the trust deed has become valueless through no fault of the beneficiary, or that the beneficiary’s interest in such property has little or no practical value to the beneficiary after taking into account factors such as the nature and extent of the estate in real property which was transferred in trust; the existence of senior liens against the property; the cost to the beneficiary of satisfying or making current payments on senior liens; the time and expense of marketing the property covered by the deed of trust; the existence of liabilities in connection with the property for clean up of hazardous substances, pollutants or contaminants; and such other factors as the court may deem relevant in determining the practical value to the beneficiary of the beneficiary’s interest in the real property covered by the trust deed.