Even a good mechanic devoting all his time to the job (and has done it before) it will take the best part of his day to swap the turbos.
Also with the injectors you may/may not be able to run the car on a base tune as all the injector related settings will be completely wrong (even my PFC tuned to run 550cc injectors, when I put the 700's in just blew black smoke everywhere when you even lightly touched the throttle).
Id say do the turbos yourself (if as above, you have lots of time, space and tools), do the FMIC yourself, do the boost controller yourself and leave the rest to whoever is tuning the car.