Brother’s House Purchase

My brother and sister-in-law just bought a house. My thoughts are:

1. They are buying more house than they need.
2. They aren’t going to be able to afford the house and maintenance.
3. They don’t understand the costs of owning a home.

I think I’m having these thoughts because I’m jealous and I think I want to be able to afford a bigger house, otherwise I’m not sure why I care how big their house is.

I tried to do a model.

C – R and J bought a house w/ 6 bedrooms, 4 bathrooms, 3,700 sq ft
T – I wish I could afford a house that big
F – Jealous
A – Criticize them in my head, think of all of the reasons it won’t work out for them, hope I’m right, look for evidence that I’m right
R – I don’t figure out a way to buy a house that big, or if I actually want it.

Something seems off with the model. Maybe my thought isn’t right because I don’t know how much they are paying, but I can’t afford that much house in that condition where I want to live but also if someone told me tomorrow, I could have the house they are buying I wouldn’t want it. I just want to criticize what they are doing and hope it doesn’t work out so I can feel better.