We're talking about 17,000 new modems - eg, new connections.
17k connections is a big number for you, but it's just a drop in the bucket when spread across the country. It really isn't significant. The only area there would be possible issues would be a sudden and very sizeable increase in connections in a small geographic area with only radio coverage, be it WISP or RBI. Radio is a finite resource so overloading an RBI or WISP tower if there wasn't careful planning first (which there is, so don't worry about that either) could lead to congestion.
EDIT: Fixed so it read better.