A hundred a day for tips? Are you one of those people who suggests tipping everyone with $10 notes?
Not everything is tip worthy, and the general rule I've always followed is $1 tip for small things eg taxi's unless it's a long drive, in which case it's 10% of the fare, a $1 per drink at the bar unless there is a tab in which case I'd treat it the same as a restaurant bill, and around 15% of the post tax bill at restaurants, and I tend to leave a dollar or two for maids at hotels (a good way of getting rid of extra coins)
Sometimes I'll go a little higher if the service was really good, sometimes I'll go a little lower if the service was poor.
So carry at least $50 a day for tips? in 5's and 1's?
What the cost of things over there? eg; How do they compare? Cost of food, taxis, sightseeing, shopping..etc.