I have looked around for Bilal Studios (Serdan Towers maybe) and it is priced at 11,000 for a 1 bdrm. This link is from qatar living site.

http://www.qatarliving.com/node/577982

Also, for Bilal especially have a look at the pool because it seems pretty small, but everything else seems good.

ps: Disclaimer I am only talking from stuff I investigated online. I will be in Qatar 2 weeks from now.