Nice MOD. I recently began playing SRTT, and I had all the DLC thanks to the Humble Bundle....
And it made me feel bad to realize the DLC is basically a "pay to win" upgrade, as flying around in a VTOL Fighter plane with missiles and lasers makes many of the open map activities (like the gang missions, or destruction challenges) trivial.
Still, I'd adjust the prices so purely aesthetic vehicles are somewhat cheaper than the overpowered military ones.
I'm getting into modding, so maybe I'll take a look myself.