Not at all . Bunjee Jumping mainly in Rishikesh and it is highest in India best go for it. For Paragliding you can go Bir Billing, for Hiking there are lot of things but depends in which area you are going.
You can use credits to redeem trips from the get paid to travel section... minimum trip credits right now are 300.. you can check any of those and that will give you some idea
Its not just like 42 rs .Here are some discounted trips available in "Get Paid to Travel" Section so you can use those credits and redeem against some trips and will get the great deals. Currently min 300 credits required to redeem one trip.
October end Or November is a Good season to go for scuba and other stuff September will be raining season so chances are less to do your activity. November is the Best Time to Go.
If it's two day plan I would say to plan for Cherrapunji and Dawki river. Stay in Shillong from there you can book taxi to book the places.
Day 1: Shillong - Cherrapunji - Shillong
place to see Elephant Falls. On reaching Cherrapunjee you can visit Arwah Cave, Noh-Ka-Likai Falls, Mawsmai Cave.
Day 2 : Shillong - Dawki - Shillong
Visit cleanest village in Asia- Mawlynnong. On reaching Mawlynnong you can visit The Village, Balancing Rock and Living Root Bridge. Later drive to Dawki. Here you can enjoy boating in the crystal clear river Umngot. Later visit the Indo-Bangladesh border.
Note : If your total trip is only for two days then you can plan as per Day 2.
You can find a bus from shimla to Reckong peo then reckong peo to kaza..
you can also check hpdtc busses tour they also organise tour busses or buses to kaza
When are you planning to travel?
You should spend at least 2 days in jaipur.. remaining 2 can be planned in another place like jaisalmer if winters or udaipur