You should carry extra money to spend during the trek. You have to manage yourself for the alcoholic and non-alcoholic drinks, the hot shower on the trek, the tip and the shopping during the trek.
On the other hand, Kathmandu is a shopper’s paradise. Often purchased items are hand-woven Tibetan rugs, hand-knitted woollen goods, hats, outdoor clothing and clothing, Kasmeer clothing, scarves, pashminas, Buddhist Thankas, carved masks, dolls, woodcarvings, and jewellery etc. We recommend bringing along € 200- € 350.