Coolant problems

[Duane Loux]

Hello everyone and experts compared to my limited knowledge. Long story short my 02 boxster s has a coolant leak in the expansion tank. It's at the dealer now and they want 2 grand to fix it (are they crazy?) i'm about to find out what all they are trying to charge me for but my question is how hard is it to swap the tank. And what all is involved in doing so? Could a do it yourselfer like me attempt such a feat?

Do I need to replace more than that, I herd they want to swap out the coolant pump too, but not sure why.

Thanks in advance for any help you all could give!