India Itinerary advice

Me and 5 of my friends are going to India for 16 days in August. We decided to stick to the North as many people suggested and came up with the following itinerary:
We land in mumbai on the 19th August and are going to fly out to Dharamsala straight away. Going to spend 2-3 days there, then head down to Rishikesh (or Manali haven't decided yet) and spend a further 2 days there before heading to Agra for the day to see the Taj. After Agra we hope to go to Pushkar for a day or 2, then Jaisalmer for 2 days after which we will head to Jodhpur for 2 days and finishing in Udaipur 1-2 days, we will then fly or get a train to Mumbai (depending on how much time we have left).

Do you think this itinerary is doable??

And also I wanted to know if Night trains are available for the trips we are going to make?

Thanks in advance,
Nick

For trains check www.erail.in. Also if you want to travel by trains read http://www.indiamike.com/india/india...012-a-t165379/