I think survival would only be manageable on a few factors.
Population erased at around 3am. This meaning, clear roads.
All shops somehow open, good luck breaking into tesco. So would need to be a weekday.
Petrol stations open, so weekday 24 hour Shell etc.
More importantly perhaps, failsafes. I dont know how the internetz work in regard to this but it would be good to have access to spotify so you dont go mad over the next 50 years. Solar power can provide the electric you need, but what about servers at their end, and ISP's etc?