Here is what you do:
-Figure out EVERYTHING you will need to do the job CORRECTLY.
-Buy quality parts, especially your fuel management, and a good wastegate. Get good headstuds and headgasket, while also making sure your motor is healthy enough to support boost.
-Have someone who knows what they are doing put it all together for you.
-Get it tuned immediately after installation.

Turbo kits are easy to be pieced together while also maintaining reliability, you just need to know what you are doing.