I don't think investing on lands in the cities is a good idea. The price of land in Kathmandu is expensive than that in Houston, USA. LMAO. If you really want to invest on land, you should focus on the remote sides of the country. Since, people living and working abroad are sending lots of money back home, and the condition of transportation is improving, I would recommend you to buy lands near your villages. Nowadays, people in the villages don't give away their extra cucumber to their neighbor that grows in thier backyard. They rather sell it for Rs 50 in the market nearby.

I have one place in mind if you really want to invest. That is: Bardibas. The new Banepa Bardibas highway is almost complete- that connects Kathmandu and Tarai. This highway is much shorter and convinient than the old highway. The good thing about Bardibas is that- it is still a VDC(I'm not pretty sure, now). If you go to tarai, you will see how Janakpur is dying and Bardibas is developing. 

How to bring money to the USA? If you are a student, you can bring money easily in the USA hoina ra since you need money to study.