you dont save much by reloading shot shell's unless you start looking in the span of years unless your going to reload steel or alloy shot for bird hunting, the cost of lead shot is what makes it expensive... even then you need a good supply of empty hull's to reload...
i dont know of any places on the island personally but like i said someone else may and you can always try a trap/skeet club, just call em up and explain the situation... there a friendly bunch and can probably point you in the rite direction.