There’s nothing wrong with a 911 (my dream car) but they will be costly to maintain and the huge red flag as mentioned is this car needing a clutch after less than 30k miles.
This means the owner has been driving around with his foot on the clutch pedal all of the time (not so bad) or he’s been driving it clean into the pavement. (bad)
Price that clutch job and you may decide to walk away from this.