Rewiring my Duster, but have a few questions

First impressions from a non-electrical guy:
1.) 18g. seems kind of light to me- why do you want the VR in the trunk? My meager knowledge tells me to keep it closer to the alt. and ignition for simplicity's sake and fewer potential issues...
2.) Self-resetting breakers. Where/how are you wiring in the temp. sensors for the fans?
3.) Depends on what you're running for headlights. Stock sealed beams, the bigger the better. LEDs have a lot less draw, 14g. should be fine. Halogens? Somewhere in between.
Other: Batt. neg. you can ground right to the frame/body and save yourself some $$ on single 0 cable, and then do the same up front- frame and body to engine block. You can't run too many grounds!
I'm sure others will chime in with corrections to my thinking, or other suggestions as well.