@Alec Jacobs, there's no amount of time you "HAVE" to live in your house hack. There's no law you're breaking (not directly), and nobody's going to come and check.
Here's what it comes down to: when you sign an owner-occupant mortgage, you're agreeing to live there for at least 12 months. That's the paper definition of "owner-occupant."
Again, nobody's going to check that you live there, and if you move out in three months, nobody's going to care. You have to keep paying the mortgage, of course, but so long as you do, your lender won't care where you physically live.
An issues arises, however, if you want to get another owner-occupant loan within 12 months. Your original lender probably won't even accept an application from you. And you're likely to fail underwriting with other lenders. Why? Because by applying for another owner-occupant loan within 12 months, you're clearly demonstrating that there's a serious risk you won't stay in this second home for 12 months. Lenders don't like that.
After the 12-month-mark, most lenders will be fine giving you another owner-occupant mortgage.
Good luck! I house hacked in 2019; best move I ever made.
Best,
Jon