PLUMBERS back!!!?? i got a quote from a plumber for 2800.00 to 3000.00 for: Putting...

i got a quote from a plumber for 2800.00 to 3000.00 for:
Putting contained by rough plumbing in a converted garage for a modern bathroom that includes a toilet drain, shower drain, and plumbing for 2 sinks. they will have to break up the concrete slab at roughly 20 ft to connect to the main sewer file. Is this a good quote?
Bamboo bedroom furniture?
Answers:    for the work involved don't nouns like a impossible price.
Where can I find a 3 sided mirror...
I would ask for a new quote, short breaking up concrete, and get at least possible two other quotes, then walk to home depot and rent a jackhammer to break up the concrete myself!