Motor assemblies and the hub likely take the brunt of the stress and would require the most maintenance. Servicing them in the long term is a problem in that th

Motor assemblies and the hub likely take the brunt of the stress and would require the most maintenance. Servicing them in the long term is a problem in that there simply not enough qualified people to do that job. Figure part electrician, part mechanic, and more, just to be able to work on one. Then throw in that candidates for this work must be very physically fit and mentally agile to be able to do the two hundred foot or more climbs. So besides the material costs of building and maintaining we may run up against one that isn't fixable as quickly, getting the people to do the work.