Thanks for comment.

According to lawyers' replies here, no need to renew passport of home country for US citizenship.

http://www.avvo.com/legal-answers/can-i-become-a-naturalized-us-citizen-with-expired-600743.html

There is just that simmer of hope that if there will be dual citizen law later on, having a valid/current passport may be useful. :(

The visit to India part came in mind not due to cost but as convenience and that's also while driving back and forth from Nepal since it's open border for Nepalese.
The last time I went to India from Nepalgunj, nobody even checked any id in either direction but that was 20 years ago.

BTW, what's the hold up on dual citizenship?

PS: I'm not sure why Sajha replies and posts twice for the same reply/post.