18-20k should be sufficient. Just make sure to take all the permits. you will need one at Rohtang pass, another at Keylong and last one in Leh. if you have your own bike, it wont be much of an issue. Keep all the consumables with you. and it shall be a great trip. Happy Touring
Hi Suraj Sharma, I have attached with this comment a package for rs.5830 for Ladakh. You can click on them to find more details about them. If you want to talk to someone about the packages simply fill in your details in the form and you will receive a call.