what does it cost to do a national (US) poll?

What does it cost to do a national poll of 1,000 or 2,000 people (assuming a dozen questions or so)? By costs, I just mean the phonebanking and tallying costs, not so much the analysis, but if people have ideas on any arrangement that would be great. Does adding more questions or 100 more people make the cost go up substantially, or is the “setup” the major cost?

Thanks.