Okay so after some research and some hiking I realize that 3-4 days is not realistic. I do want to go to Tibet, so maybe 7-8 days and include a visit to Everest Base Camp. Does anyone know how much a private tour would cost? It seems like most places online only offer group tours, and they're around $1000-1500 for the tours I want. But I really want a private tour for me +1.

I already have a Chinese visa (US passport holder).

Recommendations welcome!