They live in a very modest rental now, I think $2,500/month. That is $30K a year.
If you buy, say, a $2 million home and get a 4% mortgage, that is $80K a year in interest, but you get back 40% of it I guess on a fairly high income. Add property tax and insurance and maintenance. It works if prices keep up with inflation (long term real estate only does that) and you ENJOY the larger house and grounds. Crashing prices are very bad, and it will happen sooner or later- the price appreciation looks parabolic, and we know that never continues.
They work regular hours but have a life outside and a yard and such would be a joke to them. They would rather go out dancing and to restaurants.
The key is, as usual, don't spend too much. The boyfriend has a fairly new Audi but she has a (no lie) 2001 beat-up Honda with a bumper falling off (duct tape). He enjoys driving and is the designated driver, always. She hates it and spends nothing on cars. But she has plenty of time for her arts and crafts interest.
Anyway I was kidding about killing them. They go their own way. Can't tell your kids what to do. All you can do is... "teach your children well," then see how things work out.