I haven't read all the replies either, but I know some people who have made up "resumes" for their dog while looking for apartments. Pointing out all their good features, despite their size, with testimonials from previous neighbors, etc about what good citizens they are. One thing worth noting is most greys are not barkers (my boy Quiet Man is, but that's another story)
Another thing to remember is adopting a dog should be for life, regardless of circumstance, barring things out of your control such as illness etc. I am one who personally does not see moving, divorce, having a baby, etc. as valid reasons to give up a dog. I actually quit my job which involved traveling after my divorce so I could be home to take care of my grey. Some might say that is extreme, but that is my committment to him, to be his "forever home"
Btw, I wouldn't go with anything lower than a 5 foot fence.
Good luck, and I commend you for doing your research.