You didn't have warped rotors, you got taken. A replacement wastegate costs $60 from ATPturbo.com. Your engine mounts are probably fine and OMG a gasket is leaking after almost 60Kmiles, its a $15 gasket max. Sucks your LSD went out after warranty but it sounds like you're falling for all the dealership's lies and they are exploiting you.
I drove my MSP off the lot with 500miles and the largest non-maintenance repair I've done is replace the WGA. Amazing after 50K miles, 7 days at the track, 3 autoXs, 12psi drag races and everything else I've put my car through it runs fairly perfect everyday.