$30 to $40 a month would be a very reasonable charge as I think most would agree.
Many carriers including my own charge 25 to 35 PER WEEK.
Huge difference between 25-35 per week verses 35-40 a month.
About $100 extra per month per unit.
I pay 245.00 a week now for 7 trucks which is $12,740.00 a year.