2)Also, How long does it take to travel from Manali to Delhi? Which place on the way would you recommend for a stopover?
It takes approx. 16 hours by bus. Its not a relaxed trip. Especially in the mountains. But all the best. If you want to take a stopover on that line. Then Shimla pops up in my head. Another fine hillstation.
That is a pretty long route. Definitely need a stopover. My mother won't be able to handle it. Do you think it is easier to go from Manali to Dharamsala and then down to Amritsar and back to Delhi, rather than trying to come direct from Manali to Delhi?