the term “development cost” means the costs of constructing, purchasing, improving, altering, or repairing new or existing housing and related facilities and purchasing and improving the necessary land, including necessary and appropriate fees and charges, initial operating expenses up to 2 per centum of the aforementioned costs, approved by the Secretary, impact fees, local charges for installation, provision, or use of infrastructure, and local assessments for public improvements and services imposed by State and local governments. Such fees and charges may include payments of qualified consulting organizations or foundations which operate on a nonprofit basis and which render services or assistance to nonprofit corporations or consumer cooperatives who provide housing and related facilities for low or moderate income families. Notwithstanding the first sentence of this paragraph, the term “development cost” shall not include any initial operating expenses in the case of any nonprofit corporation or consumer cooperative that is financing housing under this section and has been allocated a low-income housing tax credit by a housing credit agency pursuant to section 42 of title 26 .