While €175,- might be cheap you'll be lucky when it's just the towing costs you'll have to pay. If for whatever reason your car lost oil/fluids it'll cost you a lot more.
Cost of 1 marshall per hour : €60,- (2 marshalls per car)
Cost of 1 marshall-car per hour : €36,-
Armco per meter : €40,- (mind you in most places there are 3 armco's on top of eachother so 1 actual meter = 3x €40,-)
1 Armco pole = €45
Closure track (in case of oil/fluids or bad wrecks) €1350,- per hour