I just got off the NA (7 day Caribbean), and they had 3 tiers of wifi offered. The most basic was "Social," which let you text and go on social media sites. That cost $70. The middle level was "Surf" which also included checking email and visiting websites. That cost $100. The top tier was the Premium, which cost $140. My guess would be these would be more expensive for your 14 day trip, but hopefully this gives you an idea of what was available.