A couple of points:

I'm not sure about 'ample' supply. Unconventional gas is more expensive to drill than conventional, and it is not clear how much supply could be ramped up before the price goes exponential. As documented on TOD, the current glut has led to half the NG drilling rigs being idled. That alone could cause a sudden shortage in a year or two if we have a cold winter or hot summer. Large scale investment would be needed.

I would run a mile from anyone trying to fill their CNG tanks from a domestic spigot. The supply needs to be compressed, the compressor is not on the vehicle. Domestic gas line pressure would very quickly fall to dangerously low levels if every house in a street pulled that trick.

You need to spend money on the infrastructure.

I think it is actively suppressed by the car/oil companies. It is given a 'third world' and 'unsafe and unreliable' image.

It will not be a cheap option, but a lot cheaper than all the others.