; creation, subsidization, construction, acquisition, rehabilitation, and preservation of housing in a community land trust or shared equity homeownership program, and expanding the capacity of the recipient to carry out the grant, provided that any housing units created or maintained— (1) in the case of rental units, including units in mixed-use properties, are affordable and accessible to a household whose income does not exceed 80 percent of the median income for the area, as determined by the Secretary, for a period of not less than 30 years