Possible Clues:

• Just take a peek at what it costs to maintain
• Cost of maintenance, say household
• Don't fall behind changing parts for maintenance
• Cost of support
• Just take apeek at what it costs to maintain
• The cost of maintenance
• Cost of maintaining superior castle?
• Peek up at the maintenance
• Have a peek, perhaps, at the cost of maintenance
• Just a peek at the cost of maintenance