The best price for the different parks you will have when you buy on the official website of Universal or Disney. Regarding transportation, please contact the hotel directly, they will assist you in English or Spanish to see what you can do to get to and from any destination.
If you go to the Universal studios website, there is an offer to buy 2 days, and they give you 3 days for free. But I do not know if the offer is still available, it is better to check the website.
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