Bandwith: 40 GB
Web space: 250 MB
Operation system: Linux
I am looking;
fast and reliable
You should be able to find a host very easily in your $20.00 price range. Check the WHT web hosting offers and Google. Also do not forget to test there support via live chat or email. Good Luck to you.
How much of those 15000 members are active? Bandwith isn't really important. CPU usage and sql concurrent connections are.
I use good webhosts that really give me much more than that without a glitch, and for a lower price.