These are the most famous English newspapers in Nepal. However, the No. 1 newspaper still remains "Kantipur", which is published in Nepali language. You can post an English ad in Kantipur, since that is read by most people.

Check these links for details:

www.thehimalayantimes.com
www.ekantipur.com

I would also suggest you to contact the Nepal embassy in Qatar to understand the legal issues.

Good luck!