i am not judging you and fully believe that you support their work but from economy stand point I disagree on your point "anybody can make heavenly looking house with that much of people's money". No you can't build heavenly looking house with just 10 lakh. I am not sure how much you are familiar with Nepal's inflation but 10 lakh is not a lot of money for sure. it is barely a sufficient money to build a house. Not to mention their time, effort, battling through corrupt people etc if you can manage to build a decent house with just 10 lakh you really have to applaud them.
Frankly saying, at this condition where people are desperate and lost all their hopes, even if they take 50% of the donation money and give 50% to the community we should be more than happy because there are no one out there who truly wants to help.