Collapsed drain water pipes: what to do?

Hi all,

I live in an atrium Eichler in Sunnyvale. We've had repeated stoppage problems with the kitchen sink, dish washer and washing machine (in the garage) for a little while now but the current one is the worse. The pipes seem to be 100% blocked even though 2 different plumbers were able to get a 100 feet snake through.

I am being told that the most likely scenario is that my drain pipe somewhere in the slab or under just collapsed and that I may need to jackhammer through the new flooring to find the problem and fix it.

Anyone lived though a similar situation? If yes, I'd love to know how you sorted it out.

Thanks for your advice.