Had one for 13yrs, 2 year break by the wifes orders, she couldnt deal with losing her, just got a pup in Feb. You need a lot of time and they need PLENTY of exercise!
If our old gal went two days without a good long run she would start doing laps around the dining room table. For like 45 minutes. Our new pup just gets downright ornery if she doesnt get run daily. Shes chasing robins, but does not really point yet. All in all, I love em to death.