Rebuilding a turbocharger is not a DIY job.
Remember that if your turbo blows up due to an improper rebuild, all that metal shrapnel gets ingested into the engine, damaging the cylinder walls, valves, and valve seats in the process.
'97 E300 Diesel (daily driver)
'87 Porsche 911 (track car)
'02 Porsche 911 (weekend toy)