Expiry dates of packages

Hi James. I’ve changed the way I charge so that clients pay for 4 classes over 4 consecutive weeks, with no carry forward of class fees. As I understand it the the expiry date of a package is the date when the fees must be used to book classes and not the cut off date when the classes must be used by (hope that makes sense) - so if I set the expiry to 4 weeks after purchase, someone could still book for dates beyond the 4 weeks.

If I’m right, is there any way where I can linit the date of the last class of a package? I don’t want to set up memberships as they wouldn’t work well for my clients.

Thanks in advance