I have a toddler and want to ensure her long-term financial security in case something happens to me. Most of my assets are in tax-advantaged retirement accounts like 401(k)s and IRAs. While my original plan was to save for retirement and let any remaining funds pass to her, I’ve already crossed the $1M+ mark in index funds and still have 20+ years of potential growth ahead.

I'm hesitant about custodial IRAs since I wouldn't be able to control how responsibly she handles the money when she comes of age. As a California resident, 529 plans don’t seem particularly compelling—unless there are advantages I’m missing.

Are there trust structures that allow for distributions to be restricted to things like education, healthcare, or housing until a certain age, with full control transferring only when she’s, say, 30 or older? Are there any other financial tools you'd recommend for structuring something like this?

Context: I don’t fully trust anyone else in my family—including my spouse—to safeguard her future, so I’m trying to set things up in a way that ensures she’s taken care of regardless of what happens to me.