^^^
If you're not comfortable doing it yourself, your bike shop can add those accessories like fenders and chain guard right at the point of sale. Heck, I bet if you offered someone on this forum some pizza and beer, they would happily go over to your place and install them in about 30 minutes.
Hey, if you want to spend the $800, no big deal. Nothing wrong with that. I'm just saying that's a pretty penny, at least to me.