Property tax rate in SF caps at 1.38%, which would be ~$40,000/year. How are you spending $60,000/year, every year, on maintenance and insurance? Are you saving up for a new solid gold roof for every decade?
My average has been around $30k/yr but my house is worth well under $3m so I could see it being closer to $60k. I do include some remodeling in that figure, but things wear out and you aren’t going to want to live with a decrepit interior in your $3m house…