How much am I looking at to replace my water pump,thermostat, and coolant sensor

Yes Tarheel l am OK so I spoke to a mechanic and he seems to think I have a blown head gasket I'm not sure but anything I get done the water pump or the head gasket it will have to be paid getting it done the man told me 270 to do water pump and thermostat and then said he felt like I had a bigger issue cuz the water pumps aren't known to go out on Chrysler Town and country your advice would be greatly appreciated.

it very well could be a head gasket.it could also be the water pump and or thermostat?idk! if you are in doubt of the mechanic,then i would get other opinions,from other mechanics or if you can change the water pump and thermostat your self,then do that.are you losing coolant and/or white smoke coming from tail pipe?