I want to build a minimalist gamer setup, like a case-style one

I don’t know what this type of open cabinet is called, so I’ll call it a case.

pc gamer aberto
I don’t find much information on the internet, but I believe it is much easier to assemble.

My goal is to gain space and bring more airflow to the whole PC and especially the GPU, because here in Brazil it is very expensive.

Do you have any tips on what material to use and what precautions I should take?

They don’t have a specific name; they are modified PCs but are called open PCs or wall PCs. They are made on an acrylic board or MDF to prevent short circuits in the PC components.