I think you'd be hard pressed to find a model maker that wins 2 dots worth of contests, even without a car.
Most hobbyists make it from paycheck to paycheck with only a bit in between to spend...it's a risky profession with a niche market and a lot of competition so admittedly, you wouldn't have the corner market. Resources seems realistic for high paying jobs, but one you're doing seems that you wouldn't have the necessary business/time/money to have 2 dots worth...maybe even one, but that's a stretch. The resource dots represent the fact that after all your normal expenses are paid for food/more models/paint/rent/medical/dental etc you have X amount of money every month you can throw around.
Of course the call is to Grumpy, but it doesn't seem realistic to me...unless you were your own factory, painting in your sleep, and had some sort of partnership with a larger distributor.