or at least can't i just buy a code for like 10€ to get acces to PS3 with my account?

Buying 2 games sounds a bit excessive to me. Mainly since we already paid twice for PC.

If anyone knows something i dont, please help me out with this ^^.

PS: The point of this topic isnt to know if pc or PS3 is better. I know PC is best but for ease when i dont play at home its much easier for me to grab my PS3 than my PC.