The Secretary may make grants under this section to owners of federally assisted housing projects described in subparagraphs (B), (C), (D), (E), (F), and (G) of section 13641(2) of this title. Any grant amounts shall be used for the costs of employing or otherwise retaining the services of one or more service coordinators under section 13631 of this title to coordinate the provision of any services within the project for residents of the project who are elderly families and disabled families (as such terms are defined in section 13641 of this title). A service coordinator funded with a grant under this section for a project may provide services to low-income elderly or disabled families living in the vicinity of such project.