If he can't get broadband, he can't do his job. If he can't do his job, he (probably) can't make his mortgage payments. If he can't make his mortgage payments, he can't live in the house.
Except that he can get broadband; he just can't get it quite a cheap as he wanted. Either this story or yesterday's mentions that he was paying $5 a GB for cellular data (3G?), and running up about 30 GB a month in usage. So, $150 per month. The hookup he wanted would have probably cost, what, $40 or $50 a month? If he's living so close to the edge that an extra hundred a month puts him on the street, then he couldn't really afford to live in that house anyway. (Some of us are out of pocket more than a hundred a month for a bus pass to get to work. We suck it up; it's a cost of doing business and living where we choose.)
Of course, this guy also claims to have offered to pay "a good chunk of the cost" of installing the cable to his house, which would have run into the tens of thousands of dollars. If he was willing to splash out for that, then he could have afforded to pay even utterly ungodly cellular data rates for years. Bluntly, the only plausible explanation is that there's more going on here than meets the eye--the financial and technical case don't credibly add up to being "forced" to sell his house. Either he's got additional reasons that he wants/needs to move that he isn't sharing, or he just really craved some attention.