Delay before being found - SN

[maynoname]

Hello everyone,
I was wondering one thing, which mainly worries me.
My plan is to CTB around 10:30 p.m. I would probably have a 13 hour window before someone got worried and sent someone to my house.
How many hours is best to have before you are potentially found? Do you think 13 hours is enough?

To clarify, I don't want there to be any chance of me surviving.

 

[ctbusser]

According to PP book death by SN occurs in 40 min

 

[maynoname]

According to PP book death by SN occurs in 40 min

Thanks for your reply.