Legalize building
What I believe: a young family should be able to afford a home in the state where they grew up. That used to be the default in America. It still can be.
What's in the way: we made building illegal: minimum lot sizes, parking mandates, discretionary reviews that drag on for years. This isn't market failure. It's rules, written decades ago for a different world, that reward whoever can afford the lawyers to fight through them.
What I'd do: use federal dollars as the lever: tie transportation and infrastructure money to zoning that allows starter homes, duplexes, and apartments near jobs. Streamline environmental review so it protects rivers instead of vetoing neighbors. And fund a serious trades pipeline, because legal homes still need framers, electricians, and plumbers to build them.
What it gets you: kids who can stay, towns that grow instead of gray, and paychecks in the trades that don't require a four-year degree.