When does practical success become a prison? Franklin's industry meets Thoreau's simplicity.

I'm earning $180,000 a year as a product manager at a tech startup in Austin. On paper, my life looks great. In reality, I work 60+ hours a week, haven't taken a real vacation in three years, and had a panic attack in my car before a board presentation last month. My husband and I just inherited a small farmhouse in Vermont from his grandmother. It needs work, but it's paid off. Part of me fantasizes about quitting everything, moving there, and starting a small CSA farm. I've been reading about permaculture. We have enough savings to last 18 months. My parents think I'm having a breakdown. My boss says I'm "on track for VP" if I stick it out two more years. My husband says he'll support whatever I decide, which somehow makes it harder. I know the "smart" move is probably to stay, pay off student loans faster, and max out retirement. But I wake up every morning dreading my inbox. Is this a mid-life crisis I'll regret, or should I trust this pull toward a simpler life?