And don't forget to factor in the invisible costs, for example fuel to and from the airport. Assuming £5 for the return journey and that 50% of your journeys will be wasted due to cancellations due to the weather, that immediately adds £600 to the costs, again assuming 60 hours to complete your initial training.
Re Irv's point, I wonder just how many potential students are lost through the attitude of staff to newcomers? Personal experience can only back up the point that Irv makes. Indeed last week I visited a new club and their attitude was soooo refreshing it really opened my eyes. They could not have been more helpful, knowlegable or encouraging and that was prevalent from the front desk through to the instructors.
Despite having the lesson weathered off I spent over 4 hours being shown around premises and aircraft, being introduced to staff and students and generally being made to feel welcome. Even if it wasn't the closest airport to home it would be worth any extra fuel cost. Sadly this is not the attitude or professionalism displayed by the majority of schools/clubs I have visited.