As such, there is no legal requirement to join a group for climbing any peak above 8000m in Nepal. But in Tibet, the mountaineering association has set a minimum requirement of two persons while issuing the climbing permit. However, you need to understand that climbing solo in Nepal could prove to be quite expensive and less safe than joining a group with professional team leaders, guides and porters. Of course, don’t forget to go along with a reputed company that possesses highly experienced and technically sound crew members.