I think with the Honda CNG you can buy a home fill kit IF you have NG available at your home.
Until someone invests in the infrastructure and car mfgs. make them more available, I think the Honda CNG is only available in CA and CT, we won’t see them in other areas. I wonder IF they can add CNG tanks at existing gas stations?
The payback time required to make my car bi-fuel (gasoline and/or CNG) is about 3 years. Add to that the reduced maintenance costs due to cleaner burning CNG and added engine life and it makes sense...as long as I have a place to fill it up.
The infrastructure is coming. But the industry does not want the gov't to get invovled.
So, the primary focus is first on fleet users, municipal vehicles (garbage trucks, buses, etc) and truck lines.
Once they have refilling stations, it will spread from there to truck stops and along interstates.
Eventually, like diesel, it will be available at nearly every station.
Trust in the market to make it happen right.