Hi Dianne,
Thanks for visiting Disney Parks Moms Panel, and welcome to Disney Vacation Club Membership!
The Disney PhotoPass Service is a free service.
Memory Maker is a Disney PhotoPass product that you purchase so you can have access to digital downloads of your Disney PhotoPass photos.
Practically speaking, I'd say Memory Maker is best suited to single trips. The answer to your question of using a single Memory Maker purchase for all 3 trips could be a "yes, if ..." situation. I'd say the big "if" depends on when your trips are scheduled and how you use Memory Maker.
After you purchase
Memory Maker, you activate it by downloading or unlocking photos in My Disney Experience, the My Disney Experience Mobile App, or at
MyDisneyPhotoPass.com. Currently, Memory Maker is available for 30 days once activated, and photos are available for download for 45 days from the date the photos were taken. I'd say if your 3 trips are close together, say all within 10 weeks, and if you wait until your first photo is about to expire before you activate the product, then it could be possible to get all the photos from 3 trips.
My best suggestion is to explore
Walt Disney World Annual Passes. Disney Vacation Club Members receive discounts on select Annual Passes, and those Annual Passes include Disney PhotoPass downloads. If your 3 trips are multi-day stays and scheduled throughout the year, then I think an Annual Pass is a great idea for you.
Dianne, here's wishing you lots of fun on all your Disney Vacation Club magical stays.
Enjoy your Disney!
Jerry