2) Purchase a subscription for unlimited calling to any USA Land Phone Number or Cell Phone Number for $2.99 per month. Purchasing Skype credits is not required.
Example: The Marriott Ocean Club and Surf Club both have free internet access in the rooms. Hence, for two weeks this month I called work numbers, home numbers and cells phones in the USA for a flat $2.99 and canceled the Skype subscription when I return home.
If your hotel/timeshare does not have free or cheap internet access several places in Aruba have free WiFi. I believe in the Hi Rise area the espresso cafe in South Beach Centre (opposite The Lazy Lizard) offers free WiFi?