P0017 Crank shaft/CAM shaft sensor location

That code is not a location or a part. It means that the computer is reading the crankshaft and camshaft sensors and using those signals it has determined that the two parts are not in sync like they should be.
Say that normally the cam and crank sync up and read 1-1, 2-2, 3-3, 4-4. This code means that now they read more like 1-2, 2-3, 3-4, 4-5.

It also means that both sensors are working as they should be and not a sensor problem but an actual mechanical issue. Timing chain stretch is a very common one, as is a failed cam phaser. Not easy to tell exactly without testing it to see what the problem is. To do that testing takes some special equipment and access to known data to compare it with. Not a common DIY thing to do.

Depends on how well equipped and trained the mechanic is, and that applies to both independents and dealerships. The bigger issue is finding a place you trust that is honest.
I would ask around and see if a friend/neighbor/relative has a place they trust. If nobody has one they really like then use the dealer.
The "advantage" a dealership has is that they may have seen many of these and have worked out repair shortcuts.