Direct answer
Buying a 2–4 unit property as your primary residence, living in one unit, and renting the others — often reducing or eliminating your housing cost.
Expanded explanation
House hacking qualifies for owner-occupant financing (FHA 3.5%, VA 0%, conventional 5%) on multifamily up to 4 units. The other units' rent typically covers most or all of the mortgage. After one year of occupancy, you can move and repeat with another low-down owner-occ loan. The fastest beginner path to scale.
Examples
- FHA 3.5% on $400k 4-plex: $14k down; live in one unit, 3 rentals cover PITI.