We can't have a character unable to afford all of the frivolous magic shit. That would create too much character tension and motivation. Who wants to read a story about being poor in a fantasy setting?

As I wrote that, I realized more and more how little thought Rowling put into her created world. He spends time with a poor magic family and they still have things like a family house and land. They don't show adaptations they have to make while living in poverty like cutting costs on food or luxury items.

There was also a mistake on her part by making the dad obsessed with the nonmagical world, yet unable to utilize savvy to benefit himself or his family. I mean if you can't afford to buy clothes from the magical world, and they don't seem all that different from mundane ones, why not get a job in the muggle world where being able to magic shit would give an advantage?

And that in itself speaks to Rowling's lack of creativity. She could've illustrated arbitrary value on things. Like Ron getting dress code violations or teased for only being able to afford muggle shoes or whatever. A kid wearing expensive Air Jordans to magic school and getting a reality check on arbitrary markers of class? That would be interesting and you could still have the story be much the same.

Oh well...

Accurately depicting a class-based society with vast wealth disparity is when literally everybody gets to go to wizard Eton/Oxbridge.