Hi Markus!
I, too, live at home with my parents.I'll be getting my degree in May though, so hopefully I move out soon! (along with getting my grey)
What made you want a Grey specifically?
I just wanted to add that after getting Shelby, my cockatiel, I got Jon mostly to keep him company. Of course, they hate each other. If you're going to get a second bird, get him/her because you want to expand your flock. You'll never know how one bird will get along with another.