said by Bob4:
Get an electric pipe thawer (Google it). They run close to $1000.
Or you could get those pipe tapes that plug in and clip to the pipes. The parents have an issue with a cold water pipe in their house. It's in an addition with a crawl space and sometimes the cold water pipe would freeze. I installed one of them quite a few years ago and it's worked beautifully. It definitely was well under $1000, my guess would be $30-50.