L320 water pump replacement how long should it take

Hi all as per heading I have a coolant leak had a garage look at it and confirmed my suspicions of water pump but are to busy or don't want to do it !!! so anyone know approx how long it may take. I'm disabled with back problems so anyone near to Crewe that could either do the job with me or for me willing to pay thanks Malc

Bump!

What engine is it?
If 2.7 v6 cant be more than an hour or twos work at the most.

Hi Lynall it is the V6 2.7 with my problem I'm limited to doing 1/2 hr at a time as it becomes too painful I may have to look at doing it in stages but means the car is off the road for a few days but it is what it is Malc