Assuming they make 10 thousands (though they make more)dollar a year that is 30 billion. Making Nepal like Switzerland first u need a lot of time and a lot money. With everything in place offcourse Nepal can like any advance countries. Thinking is easy making it happen is what matters. Think about the time line and cost its will take to build roads to those Himalayas areas, next 100 of shops and restaurants and houses to accommodate people and tourists, health facilities doctors, Internet facilities, water supply, cables cars and airports. That makes is trillion dollar projects and a life time work but yes it can happen.