One question I havent seen asked - what is the price point on the used Tahoe? If you're going to spend that much, have you looked at comparable new ones? $80k for a used Tahoe would be a tough one for me
Everybody has different perspectives most likely ingrained in them by their surroundings. My father in law takes pride in never having bought a new vehicle; even now when used is essentially the same price as a new one and in some cases, actually more. They bought a 2yr old Envoy last year for more than what new ones were selling for.
As far as affording what we drive, we don't take extravagant vacations and with a couple teenagers, pretty much live on the road putting 75k+ miles on 2.5 vehicles annually (Tahoe, accord and dually for hauling) Dually is the half because it may not move for 2 weeks and then we'll put 800-1k miles on it in a weekend.
We've always had the mindset that we were going to spend $500/month on a car payment and that payment would always be there. Just a fixed amount that is always budgeted to be there.
We've tried to keep a few of our vehicles to 200k plus and the next thing we knew, transmission needed to be replaced. Different times call for different approaches, used to be we'd trade every two years and we werent racking up the miles back then. Would usually come out pretty decent with little to nothing down when we trade and would keep the term manageable.
These days you will want to really do your homework on pricing as paying "too much" for one is a lot easier than it used to be.
Don't envy anyone starting out in this market, if you haven't bought anything since covid, the price shock is real.