Individuals can make a difference by taking action on their own as well. A neighbor picks up about 500 feet of back each day. "Her" stretch looks natural a very nice (thank you !!)
I walk my dog along the beach and pick up plastic as I go. It makes a difference.
Suggest that you instruct your caretaker to clean 100' north and south of your property while he/she does your beach, and have them bag it and hand it over to you for proper disposal.
Unfortunately there is no structured plastic recycling program in Belize at this time. A project called Earth's Oceans is trying to get off the ground here, and if it begins operations it will offer cash for plastic. Founders are local property/business owners working with Cousteau Foundation and some big-league retail outlets (which will sell goods made from recycled junk).