Yip. Buy the hikvision. It has a volt selector for longer power runs.
Possible, but I've replaced 4 of those power supplies, this week.
It TAL, you can always return it.
Haven't looked at Hikvision and TP Link pricing lately, but Dahuas IP range is double the price of the HD range. NB that's comparing cost prices.
The Turbo HD cameras aren't bad. Although at 4mp and up I'd rather install IP cameras.
Coax is still around. If you look at the DIY kits, most still...
Depends on the installer or kits used. Some suppliers sell an install kit which comes with cat5e and balun. I've seen Dahua Cooper and HiLook kits come with them as well.
Installer wise it's basically cheaper or easier to use network cable as you can split the pairs across two cameras, instead...
I get that. The FE track uses half the proposed F1 track, so it could work. I honestly don't care where they race as I don't have high hopes of seeing a SA gp in the near future.