wow i just read most of that 65 page beast, drama and all, it took me over an hour lol
Gratz on the awesome grow man it looks amazing.
Coincidently with regards to your HPS not coming on im 90% sure that its simply the fuse in the plug for the ballast that will have gone. All you gota do is pop open the plug and change the fuse.
Something to do with the intial jump of power when your lights turn on makes them more prone for surges, which is why you should only ever use a digital timer apparantly.
Make sure its the right ampage tho (prob 13A) or the fuse will just keep blowing.
I say that its the fuse cos exact same thing happened to me yesterday lol, i was crapping it thinking my ballast or bulb where gone but nope just a 20p fuse =D
You could prob find a fuse to test the ballast in a computer plug or anything that uses high ampage.
+rep for the awesome grow
EDIT: further proof that its simply a blown fuse is that the switch in your breaker was down, points to a power surge