I can not say enough bad things about Texas Broadband...WHEN it worked, it was fine...but when I didn't, the customer service was so bad that they should be shut down.
We had it near Brenham (my parents), so maybe it isn't that bad closer to BCS....but I'd never recomend them to anyone.
Now they have Wildblue...which is overpriced, but very reliable.
No more than $75 per month. Not sure on bandwidth, I have unlimited now but don't do a whole lot of surfing. I upload a fair amount of high-res photographs since that's my hooby job.
Do you have digital coverage from any cell carriers. I have used my Sprint phone to connect several computers too in the past and it is about as fast as a low end cablemodem. Unlimited data is under $50 per month.
Not the best for downloading big files, but certainly good enough for browsing & email.