What factors make a monthly rental rate go up after the first year?
Our bathroom renovation ran long, so we've had a standard portable toilet on our driveway for a year now. The rental company just sent the renewal quote, and the monthly rate went up. I'm trying to figure out why. The unit gets light use, just my family of four, and sits on level concrete where the vacuum truck can pull right up. We've never missed a service visit. Is this a standard annual increase, or does something like the holding tank wear or the deodorizer formula cost more over time? What factors typically make a long-term rental rate increase after the first year?