Luckily I’m not in school anymore xD

But thx for correcting me, edited my post, should be correct now :)

You can get a 800Wp (max allowed Wp for a balcony solar) kit in austria for around 500€, germany is currently limited to 600Wp so it should be about the same price or cheaper. And you just need to plug them into a schuko outlet, so most people should be able to do it themselve.

Edit: Fixed units