If she sticks to the Northern hemisphere she will only use 20,000 miles or a little more to go RTW. She will pay for a 29,000 mile ticket if she buys J. So the trick is to not return on her international trip to her point of origin (that ends the ticket) but come back to somewhere close, use that as a stopover, and use the ticket within its 12 month time period for other flights in the Americas up to the 29,000 mile limit. You need to watch the limit on transfers but she could get a couple of extra flights 'free' on the same ticket if planned carefully. There must be plenty of choices close to Rochester from which to depart or return in order to keep the ticket open.