I don't understand why people are being so cynical here.  

The dude is just asking your "sar-sallah" on fun and affordable things to do during his vacation after three years, not your sister's hand in marriage.  

C'mon now.  

Obviously now that he has some greenbacks to his name, more opportunities to new experiences are available to him.  If you know of those, would it hurt to give him some suggestions?  

I see no reason to rudely remind him to take care of his family and what not.  I am sure he does that very well. 

I too have not been back to Nepal for a while now.  So good suggestions would help me as well.  And I am sure there are many who are similar.