I'd be very weary to even give your car to the shop that quoted you that many hours. Mine took about 2 hrs to route the lines, mostly because I had to jack the car up, take the covering off underneath and put it all together again on the floor with jack stands. I'd say it took another 2 to install the tank, and electric parts in the engine bay and testing for leaks.
4 maybe 5 at most and you can do it all yourself!
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