Cal. Probate Code § 2542

(a) All sales shall be for cash or for part cash and part deferred payments. Except as otherwise provided in Sections 2544 and 2545, the terms of sale are subject to the approval of the court. (b) If real property is sold for part deferred payments, the guardian or conservator shall take the note of the purchaser for the unpaid portion of the purchase money, with a mortgage or deed of trust on the property to secure payment of the note. The mortgage or deed of trust shall be subject only to encumbrances existing at the date of sale and such other encumbrances as the court may approve. (c) If real or personal property of the estate sold for part deferred payments consists of an undivided interest, a joint tenancy interest, or any other interest less than the entire ownership, and the owner or owners of the remaining interests in the property join in the sale, the note and deed of trust or mortgage may be made to the ward or conservatee and the other owner or owners.