What other costs would there be? That would be pretty cheap. I guess you'd have to get an ip subnet. For my comcast account that costs $60 a month, with theoretically 40 gigabytes, that's 0.15 cents per kB. Vs. your amount above of 0.02 cents per or about 7 times cheaper.
If I could pay 2k today to get a fiber internet connection to my house that wasn't limited by comcast, I'd do it in a second.
MightyYar was referring to this incident: