A black, female, greyhound.
Medium sized (average about 60 pounds)
Low maintenance (they sleep 12-18 hours a day, have short hair and don't shed much).
They don't bark unless really aggitated.
You can adopt a purebred with its teeth cleaned, and fixed for under $250.
They are an inside dog. Walk them two or three times a week for 20 minutes and they'll be exhausted. A very mellow breed.
Most states have greyhound adoption groups. I laughed my butt off, because there is actually an application process. The make sure the match is good for both you and the dog.
If you are in a warm weather state and have a fenced in back yard, its a perfect situation.