It's cute how yesterday you wanted a grey in five years, and now you're asking about if one would fit into your current situation. And then you yell at people for "bashing" you when they give your honest opinions.

A greyhound (IMO, and I honestly think Sophie would back me up on this one) needs a daily walk. Obviously, since you can't have time to give Roxy a daily walk, you wouldn't have time to give a grey a daily walk at this present time. Therefore, no, a grey would not fit into your current situation.