BMW Financing and Incentives

So I just ordered a new X5 and had to finance a portion to get the incentives. The dealership told me the minimum amt was $7500 and you had to keep it for six months.

I get to thinking and figure I can pay $7400 on my first payment and slowly pay the $100 balance over the next 5 months. That will keep the interest charges to a minimum.

Does anyone know if this would be ok and not void the incentives? Or maybe you might have a better approach.

Thanks