Problem is you can't grind your own money
What you don't understand is all the money goes on requesting a vehicle, putting armour, bullet proof tyres, all weapons and other important things like flares.
So you can't say grind your money when this server is not built for saving your money rather than spending it.
Mike just decrease the price of everything and increase vehicle armour too 2500 - 3000 as mentioned in which will combat the issue of 50 percent increase damage to vehicles.
@Mike