Creates a federally funded First‑Generation Downpayment Assistance Program that authorizes $100 billion in grants to States and eligible entities to help first‑generation homebuyers purchase owner‑occupied 1–4 unit homes. The program pays for downpayments, closing costs, interest‑rate reductions, shared‑equity discounts, pre‑occupancy disability modifications, counseling, and limited administrative expenses, sets income and first‑generation eligibility rules, ties assistance to specified eligible mortgage types, and requires detailed, privacy‑protected reporting to measure equity outcomes.