Yes it is easily possible. Dalhousie, dharamsala, mac.gange amd khajeehar is in different rout. Manali shimla kasol manikaran is in different route.. so keep in mind about that
Manali_rohtang pass trip
By bike __ 2 helmets mandatory, no helmet no petrol😂
Bike fuel __3000/bike@1.5k per head
Don't try to overtake the heavy load vehicles.. Go slow enjoy the scenery✌️
Don't dare to ride at night🥶🚳...... Stay that night at near place n continue your ride by morning Staying at manali __ 1k per head for 3N
Food __ 70 for thali unlimited roti and dal@.~1500per head
Rohtang pass taxi__650/head......... Skip bike ride to rohtang
Dress for rent to rohtang @300 __full set
Total budget __ 6k per head
Kasol , Manikaran is on diff. route and manali is on diff. route and dharmshala , macleaodganj is on other route , u will not get time to rest keep this in mind