Hi Karyn,
Thanks for visiting the Disney Parks Moms Panel with your question, and for your kind words! We on the panel love helping guests to plan magical vacations.
Unfortunately, you will not be able to take the monorail back to
Disney's Beach Club Resort without walking through Epcot. The monorail stop is at the front of Epcot, and Disney's Beach Club Resort is outside of the International Gateway entrance of Epcot. The International Gateway entrance is a lovely entrance at the back of Epcot between the France and England pavilions in World Showcase. In order to get from the monorail to the International Gateway, you need to walk through Epcot, and thus need to use a day of theme park admission.
I am not sure where you will be coming back from that you were considering the monorail, but I am sure that the Disney transportation system will be able to get you there, possibly by boat or bus.
I hope that this information is helpful for you, Karyn! Have a wonderful time planning your vacation, and please do not hesitate to ask if you have any further questions.