I saw this on TV the other day and took notes: hope this helps

Remove the valve cover
First ensure the motor is at TDC on the compression stroke for cyl #1
Next you want to mark the cams with a marker or paint
remove a single cam, follow the FSM (Factory service manual) for the order to loosen/tighten the bolts in.
They recommend taking out the intake cam first and when you are ready to reassemble install the intake cam last.

I also took note that the cams may move a couple of degrees when you remove the cam gears, so just turn the cams with a wrench to line up the gears again.

As for mechanic prices, that is a bit high just to install cams. If you call around $150 is about average price, I remember in california a mechanic who did $50 a cam. The job takes about 3 to maybe 4 hours..so even if he is charing $55 an hour X 3.5 hours your looking at 192.50. So 200 is the most I'd pay for the install, good luck, keep the forum posted on the install.