if you have enough capital and experience you do not even need to be a US graduate returnee to make it in Nepal, India or other parts of the world. .to be honest the business we learn here and business that works in Nepal are two different beasts. While in US a student crams for test and forgets most of the things after the test. has 20 things in head all the time to worry about and does 6-7 class projects till graduation. How is that going to Help to become a successful businessman. Look at other threads and even this thread by us returnees which do not even demonstrate a proper college level English. yes, read the post by the us returnee guy looking for Hari Acharya and read chana in this thread who claims of going to govt. schools in Nepal. 
I think to be a successful businessman first you need to understand your market , your end consumers, your external and internal business environments and who can understand that better, a native from that market or a US returnee who has spend his 7-10 years of life outside of the country?