That'll go down well at a busy commercial airport,maybe the side window would come in handy for taxying as well......
As PIC I am ultimately responsible for the safety of the aircraft and the flight. Finance is a secondary consideration. If it is unsafe to taxi I would bring the aircraft to rest. A windscreen that I couldn't see through would be unsafe.
Afterall, a stoppage of 20 mins whilst we clean the windows is infinitely better than a major incident because an aircraft taxi'd into something it shouldn't.