My 105 jtd has 65k on it the belt change is recommended at 75k. My garage says to get it done earlier which I am inclined to agree with.
They also say to change tensioner, other belts and water pump at same time which also makes sense to me. Dont have a quote yet so can anyone tell me roughly to expect please.

Why the water pump this should be fairly durable shouldn't it?

We have been replacing Mrs_G's water pump every other cam belt. Changed the tensioner every time.