I am coming up on my 80K mark on my 4Runner and need to do the timing belt (and probably the supercharger belt at the same time)

I was curious how much approx I can expect to pay either the dealer or a mechanic to do the replacement (assuming they will do the water pump at the same time?)

I just don't think I'm adventurous enough to attempt it myself. Also, I would consider having the dealer do it because of the S/C and them knowing the proper tension that should be set to (unless you think a mechanic could set it properly. What should it be at and how does one check that anyhow)

Thanks!!