I had to cut an 18x18 hole in the wall to repair the plumbing (@#$% plastic
pipe anyhow...).

Now I have the challenge of repairing the hole. I can use some 2x2s or 2x4s
to build a frame around the hole to attach the sheet rock to, and while a
bit of work it's not too bad and will work. Are there any other ways to put
a big chunk of sheetrock back in place that would be less work? Clips to
hold in in place, etc.?