It depends on the motor. If it has the 4-cylinder or 3.0L v6 it could take a day or more since you have to pretty much tear the side of the engine apart to get it out. The 3.3 or 3.8L engines wouldn't take too terribly long since they are on the outside of the engine.
Where is the water pump???
remove front of engine and remove timing belt It runs the pump
behind the timing cover you should change the timing belt when you change water pump.
no
No.
cant be done
No, it is possible to replace them in vehicle.
No.
parts and labor close to 150 dollars ,but for your self only 50 or 60$ only parts
its a tricky thing to change but here is a site to look at
Yes.
There isn't a vacuum line going to the regulator on a 1998 Dodge Caravan.