I agree that this should work out fine. I still would arrange for someone to come in and take her out to play for a while during the day. Do you have a doggie door to your outside? If you have a fenced yard, you might want to consider that, unless she is a barker or a digger.
If she is a chewer, you might have problems...but at her age, she is turning into an adult dog and should begin to settle down...
I guess that the main thing is that you are the only person who knows of your dog's activity level and circumstances...trust your judgment...remember you are not only trying to keep your home safe, but your dog too.