In another life I worked for a company that sent subcarrier data to subscribers. This place:
videogamekraken.com
I received a 92 KHz subcarrier from Mt. San Bruno and successfully decoded and regenerated it, bit-by-bit without error, from that very hill (via KKIQ). This was before today's fancy DSP-based receivers. I'm pretty sure it would be far more reliable for them than they might think, and certainly better than what they currently have. I sent Justin an email to that effect. There may be other reasons they don't want to use that relay scheme, but based on my experience I suspect it would work fine.
Dave B.