I had a picc lne that was put in at the hospital. Afterwards they took an Xray to make sure the placement was correct. It caused me no pain.... just a little hard to bathe, but you'll find ways to work around it (Saran Wrap - haha).
Hopefully your picc line will go as smoothly as mine did.
PS - I asked the nurse during my last round of IV's (I had a periphreal line, not a picc line) if a picc line was safe for long periods of time and she said they could be good for up to a year.