Hey i had 230rwkw or so for 12 months on 15psi or so boost and had no engine troubbles, but when i pulled the engine out was lacking a little compression i believe, they are a very strong engine but it depends what you start with.
Once you start buliding engines its always a case of why not spend a little extra, whats another $500 here another $1000 there and it gets crazy, but to do it all properly, engine build, turbo, cooler, full ecu etc nd its easy to blow well over 20k to do a good job thats not over the top, it never ends. set a goal or $$ you wont to spend and work to it