TS you got to understand something before purchasing.
Chassis dont skimp too much. I know it houses your components. But the thing is, invest a little more and you get a better chassis and comes with more default fans etc.
Fans arent cheap imho. Even the cheapest you find is a $10 fan in sls. You buy X amount of fans to mount in chassis. That will cost editional $20-30 more.
Might as well buy something like the sharkoon t28 bd28 (although not mATX) but it gives you all 3 fans preinstalled. Just an example.
The thing is chassis as you go up the range, there are more better chassis out there. There are brands like LianLi chassis which is completely tool-less.
As you go up the range, material used also change. More metal over plastic. A more solid paint work. Not sure if you have seen corsair obsidian series. If you ever try sandpaper the surface, the obsidian is insane layer painting. You can sand all day and the paint just wont vanish.
There are also other features like tool-less hdd cage. Ssd bracket mounting, fan controllers, bracket retention for wire management, kinds of mounting for window side panel, what kind of plastic they used. Etc.
So research more on your ideal chassis.