I am an athletic director at Chiawana High School and our program is needing to purchase Lightroom. My wife volunteers and takes photos at every varsity event. She currently uses CS5 to edit all the pictures but we are wanting lightroom as it would better fit our needs. We only need it on her computer and are wondering what our best option is at this time.
I have taught using Lightroom since the time it was in beta, so I think I could help you with this question and maybe others, if you find they arise. If you are purchasing this for your school I would recommend you purchase a single copy from a vendor such as Journeyed.com. It is currently 78.99. http://www.journeyed.com/item/Adobe/Photoshop+Lightroom/1562764
If you are purchasing it personally and then want to add it to your wife's computer, then you could still purchase the single copy, but I would recommend you look into the Adobe Creative Cloud for Photographers. It is currently 9.99 a month for Lightroom and Photoshop CC Creative Cloud Photography plan | Adobe Creative Cloud
Good luck to you both.