And to be clear, don't expect to win after that awful lot of money is spent. The law makes it really hard to succeed on these types of issues, and judges generally have very stringent/impractical interpretations (such as the interpretation that RAM copies are sufficiently fixed to infringe copyright).
Those are potentially why the lawsuit would fail if you're lucky. You'd still have to fight it at ruinous cost for a small business – and expect customers to disappear if there's any chance they'd be included.
