You have chosen a great time to visit Jaipur as you move into February it will start to get unbearably high during afternoon . As far as hot balloon experience is concerned I nearly missed that , but my family said they had a great time up there and you might have to wake up early , very early in the morning in order to get the sunrise view . The Cost we paid was 6000 INR . Bargaining skill can be helpful if travelling with a group .