Hi, I sponsored my mother's trip to Leh last week by Kesari tours and travels. It was from Bangalore and costed around 58k per person including flights. 6D/7N. Flights are around 15k (Blr-Leh-blr), so the rest included hotel and camping stay, food, commute, and other expenses. She found it very well organized and convenient at all times. you could try them out. Or get an idea at the very least. Enjoy :)
Hey Shraddha, Tripoto has some great options for Leh Ladakh. Attached with my comments are few packages offered by Tripoto. Please take a look, fill the form and someone will get in touch with you.
Yesterday only tripoto launched new offers for leh and ladakh. Its cheap and best part is they covering almost all points. You must check out offer page of tripoto right now.