The problem is people have simulcast issues and don't even realize they have them at times. Also, while my 436 worked ok in the town I live in and is for the fellow that bought it, as I traveled around in the county, it did have problems elsewhere in the county listening to the simulcast system. Personally at times you need more than one device to monitor all the things you might want to monitor.
While this is a wonderful fantasy, it seems to me and many others that might not be actually possible. I know there's an SDS 150 on the horizon that looks at least somewhat better on VHF analog, but you mention "cheap" also so that's definitely going to be out. I want a truck that will tow a work trailer but gets closer to 30 MPG like one of my guy's little car does too but it's not going to happen.I would rather have an all-in-one scanner.