A zoner faction with a 4.0 mining bonus might be asking a bit much as you would be making a mining faction with few real hostiles, this is minor as people will find a way to pirate you for the ore anyway and might make for some interesting roleplay situations.
I personally recommend doing some work to justify that mining bonus instead of just asking for it. Here's an example of some work the APM guys did that you might be able to get some pointers from.
