Possible Clues:

• Even a peek may prove costly
• Care and maintenance
• Perhaps peek at the cost of it
• Take a peek, perhaps, at what it costs to maintain
• Spy nearly set back running costs
• Maintain with this to get to get to the top of the tower
• Support highly placed in tower
• Maintenance completed on tower
• Seems that even such a peek costs something
• Up, look up, for maintenance