How much does it cost?
Edited
Subscribing to the Mentor Plus program costs $79 USD per month (plus applicable taxes).
Depending on how much work you have left to complete (and your schedule, of course), you may only need one month to finish up, but you can continue to extend your time on Mentor Plus for as long as needed.
You can subscribe and unsubscribe on a monthly basis without losing your work. Your progress will be saved and your work available to you when you are ready to come back to it.