What ever you do , do not open a shop or invent is land/housing !!! Its against economics !!

Everyone has different ability both financially and tactically. You do not need to be expert in what you are doing. All you need is determination and vision to success. everything works if you are determined.

Three cases

One of my fren retuened to Nepal after trying his luck in 4 countries(Singapore, Cyprus, NZ and India). he is now working as costumer service representative for Druk Air. He has also partly invested in construction equipment. He earns bout 20k from Druk Air and about 60k  a monthfrom renting the construction equipments. He still spends his spare time in his farm as his family is farmer. He has lived happily than he ever was.

Another of my fren returned from7 years in Switzerland with degree in Hotel Management. He opened a restaurent in Kathmandu with new vision attracting the rich and famous. He invested about 4 million rupees in the begining. He is now millionaire in dollars, drives Land Rover and hangs out with models. He has lived the dream of many Nepali youths.

One of my relative returned from Australia after getting PR. His aim was to live happily with his family while working lightly at any Nepali five star hotels (he had a degree and experience in professional cooking from Australia). He did that for 3/4 years, got married with beautiful lady. After that time, he felt that he could not adjust with Nepalese condition and returned to Australia.

Best of luck, I always salute anyone who goes back to their home nation after finishing their studies. I wish I could do the same sometime in future.