Just moved in and need a water company. Have an offer of AED 399 for 2 jugs, a machine and 8 water refill coupons. Is this a reasonable price?

Hi, I'm from Singapore and is thinking of relocating to Hong Kong, I'm now calculating the cost of relocation, one of the component I'm looking at is the cost of drinking water in Hong Kong. from a few sites for 1.5 litre of water it cost between 10 and 20 HKD, so how should I calculate the...