Earlier quoted context omitted.
I feel for everyone as the prices are getting stupid everywhere.... BUTTTT I just looked on Redfin - I could buy a 3300 square foot house in Austin for under $900k with a huge pool and that was a 5 second search. No offense all you Austin folk, but you literally have no clue.
Taxes for that home in TX would be equivalent to a $1.8M+ home in CA, though (and raise every year with the market), so it's not as simple as comparison. The monthly mortgage payment for a $900k in Austin is probably comparable to a $1.2-1.3M home in CA.
Are you talking about paying property taxes via an escrow account that your mortgage lender takes care of for you? That's not your "mortgage payment", which is a function of your loan size, interest rate, and term, and nothing more. The monthly mortgage payment (assuming same term and interest rate) is the same in CA and TX for the same amount of loan.
(I guess we could also talk about things like PMI, but that won't raise your payment by all that much.)
Property taxes might be quite a bit higher in TX, but I'm not convinced a $900k home in TX is the equivalent to a $1.2-1.3M home in CA. I would expect that's closer to $1.7-2M, and then the property tax amounts end up being not that different.