Licensing powerpoint question

I’m a freelance designer. I would like to license a powerpoint template to create a presentation and sell it to a client.

Question 1: should the client buy the license or should I?

Question 2: When the powerpoint presentation is done and delivered to the client, do they have to pay the monthly fee while they are using the presentation in their daily sales meetings?

Question 3: Basically can I cancel the subscription after the final product of the powerpoint presentation is delivered to them or do they have to keep paying month after month to use our own work in the template?

Thank you, Ann