Upon the return of the notice and upon proof of service of all orders of notice issued, the court may appoint a disinterested person to act as guardian ad litem for minors and for all persons under disability, for persons not in being, unascertained, unknown, or out of the State, who may have an interest. The compensation of the guardian or agent shall be determined by the court and paid as part of the expenses of the court, or may be taxed with the costs of the proceedings as the court deems just.