It depends on how you are getting there; if you take a plane to Lukla, it will cost you approximately $1000 - $1500 total on the high side, including lodging foodding and a guide, if you are new to the area it will be best to hire a guide through a reputed travel agency, they will arrange all your travel.
For your information and for those coming later: There is a more impressive and amazing trail on the opposite side of the valley as seen from Tengboche going via Mong La - Phortse - Pangpoche. Vastly better views, lots of wildlife and practically no other trekkers. Idiotic to walk the same route twice when there is a better alternative available, requiring no extra time. Only return via Tengboche.
How much it is cost completely? For nepal base camp?
It depends on how you are getting there; if you take a plane to Lukla, it will cost you approximately $1000 - $1500 total on the high side, including lodging foodding and a guide, if you are new to the area it will be best to hire a guide through a reputed travel agency, they will arrange all your travel.
For your information and for those coming later: There is a more impressive and amazing trail on the opposite side of the valley as seen from Tengboche going via Mong La - Phortse - Pangpoche. Vastly better views, lots of wildlife and practically no other trekkers. Idiotic to walk the same route twice when there is a better alternative available, requiring no extra time. Only return via Tengboche.