The best route would to enter Bhutan from India and do the crosscountry and exit Bhutan from east.
It can be done in 12 to 14 days including sightseeing.
The price are based on the number of nights in Bhutan. So if you stay for about 12 days in Bhutan, the price will be 3600$ per person. It will be inclusive of hotels, meals, sightseeing, Bhutan visa and a special permit to ride in Bhutan.
Tashi Dorji
Phone: +975 - 17119644/ +975 - 2 - 338721
Skype: acrossbhutan
WhatsApp: +97517119644
www.travelacrossbhutan.com
www.voyageaubhoutan.com