That's a pretty biased site. I've seen estimates of our current fencing plans higher than 8 billion and that's not talking about anything close to what you're talking about.
"Let Freedom Ring" is a non-profit, grassroots public-policy organization. Our mission is to promote "Constitutional Government, Economic Freedom and Traditional Values." We sometimes say that Let Freedom Ring operates "at the intersection of faith and politics." As a 501 (c)(4) non-profit corporation, donations to Let Freedom Ring, Inc., are not tax-deductible as charitable contributions.
How are they biased? Did you check out the rest of their site? I like their solution.