Hey Prateek, You can visit Leh via road only from June to October as in rest of the months road get blocked due to snowfall. Ladakh trip cost : 1) Via Road in June to October ( only time when roads remain open ) a)Bike on Rent from Delhi : It will cost you total 20k per person if you go with your friend on single bike. b) Sharing Jeep from Manali : it will cost you approx 18k per person. 2)Via Air in rest of the months It will depend on air tickets( normally 5k per person from Delhi). Then it will cost you total 20k per person. This all is rough idea of cost. So always keep +5k extra with you. You can also do a round trip Delhi to Manali to Leh to Srinagar to Delhi : Day 1 &2 Delhi to Manali to Leh Day3 Local sightseeing - Hall of Fame, Shanti Stupa, Gurudwara Pathar Sahib, Thikse monastery, Leh Palace Day4 Rafting In Zanskar river- Highest point for rafting in the world Day5&6&7 Khardung La pass, Nubra Valley, Pangong Tso Day8 Leh to Srinagar Day9&10&11 Srinagar, Gulmarg, Pahalgam Day12 Srinagar to Jammu Day13 Jammu to Delhi Happy Travelling!!!!!!!
Though the tourist season for Ladakh starts by mid-June, the best time to visit Ladakh is the first 2 weeks of July. While the Srinagar-Leh Highway opens up by the end of May, the Manali – Leh Highway opens up around mid of June and navigating through that may be a challenge till June end. The chances of Rohtang Pass and Bara-each La being closed are higher in June than in early July. Being stranded as you wait for the snow to be cleared is a very frustrating experience. I would, therefore, recommend that you head to Ladakh via Srinagar and return via Manali. The gradual increase in altitude on the route via Srinagar (as compared to the Manali route where there’s a sudden increase) offers travelers enough time to get acclimatized to the high altitudes. In case you don’t get a chance to acclimatize, you may fall sick. If you come back via Manali, you will be able to better enjoy sightseeing options like Tso Moriri as your body would’ve already been acclimatized. Also, if you go via Manali (towards Rohtang Pass to Leh-Ladakh), you would need to get a permit from Manali SDM in case you have a non-Himachal Pradesh vehicle. This rule, however, does not apply to vehicles that come from Leh-Ladakh towards Manali making the return journey via Manali a hassle-free one.
I think you can do bike road trip from may end to September. Between this period, june and july would be the best beacuse there would not much cold there and you can also experience the water steams on the way. In this period, you will get to see snow, water streams and constantly changing weather. From july onwards, monsoon starts. So, the trip won't be much exciting because the roads will put you in trouble. And one can't do bike trip from October cz snowfall starts from this month, and cold would be unbearable on bike. So, only very brave hearted fellows took such risk.
The general consensus among travelers is that the best time to visit Ladakh is in summer. The weather is at its best and the snow has melted. This season is also when the famous Hemis Festival is held. Summer is also a great time for road trips. Fellow the link below to get full info.