Vhootee ji,

I've been in Colorado for past 15 years. I've lived in Boulder the whole time with my family.
I believe there are atleast close to 8,000 Nepalese living in Colorado. Majority of them live in Denver, Boulder, Longmont, Broomfield, Westminster, Aurora. There are major student population in Colorado Springs and Pueblo because the tuition fee is less expensive. Lots of people, specially student work at gas station/restaurants/liquor stores. There are many people who work at manifacturing companies. Lots of people working at stores like Target/King Soopers as cashiers. Boulder is bit expensive compare to other cities. City tax in Boulder is much higher then Denver and surrounding areas. Denver downtown is pretty expensive too but you could get decent room for less prices in Westminster, Broomfield, Aurora, Englewood.

Kathmandu Restaurant in Nederland has pretty good food, they have buffett for Lunch. http://www.nepalidining.com/
Himalaya in Boulder Downtown has really good food too. I believe they have dinner buffett as well as lunch buffett. http://www.himalayasrestaurant.com/

Well enjoy your trip and let us know how you like Colroado