It depends on how many objects modified, how many new objects. It's 15 min on average for non report objects and 4 to 8 hrs depending on complexity on reports. You can do the math yourself for total hours. Data upgrade depends on size of db. 1-10 gig is about 8 hours, but depends on what hardware you are running. You'll be doing the data upgrade twice. Once for testing and second on actual live environment. Testing requires a lot more time nothing bellow 2 weeks.
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