Operating assistance grants under this subtitle may not exceed the amounts that the Department sets. During a fiscal year, all operating assistance grants under this subtitle shall be made from: up to 1% of the total amount of budgeted money in the Homeownership Programs Fund under § 4-502 of this title, the Rental Housing Programs Fund under § 4-504 of this title, and the Special Loan Programs Fund under § 4-505 of this title; and money appropriated from any other source.