This is excellent idea...Though Nepal is poor country..we have seen how much people spend on these weddings ..I don't see why it wouldn't work your clients can be from Rich to Middle class. Organizing reception in hotels still cost a lot of money and if some one doesn't have enough resources to run around caterer,decorator etc etc..they might very likely hire such agency. But i wonder aren't there any such kind of agency in Nepal. Who is going to Take my buisness..I can be your first client...hahahaha:) but beside being my wedding planner you should find me bride too.