If you snooze only actual bookings can see or contact you. If you de-list nobody can. It is 100 dollars near booking time, 50 further away fo cancellations. If it is only a couple of bookings, cancel them. Otherwise, snooze (but check with guests what THEY want to do, this is your responsibility) and wait for reservations to be completed.
This depends on how many bookings should she cancel. Also, I don't know how much money is involved in the change of ownership. Let's say it is an expensive house, spending a couple of hundred in fines is nothing. A transfer of a rental contract, you won't want to spend anything.