After doing a bunch of sidequests, including Vault 11, I decided to hit the Strip for the first time. When I got there I found Victor dead on the stairs of the Lucky 38 and all securitrons inside are hostile towards me. Reloading a save from 25 hours ago before I finished Vault 11 fixes this problem. Did I just waste 25 hours with no hope of finishing House's quests?

The turrets in vault 11 are part of Houses faction = developer oversight. the turrets usually self destruct after all the robots die thats why they probably didn't catch it.

Same thing happened to me. I would have lost around 40hrs. if I would have gone back. I would recommend just going to find Benny and see what happens.

I didnt enter vault 11 until after i did a few mr house/yes man quest's, explains why the turrets where green in the sacrificial room.