According to wiki, in vanilla:
thirst increases at 240/day, death after 4-5 days
hunger increases at 96/day, death after 11 days
thirst increases at 48/day, death after 23 days
I find that there are enough drops from Legionnaires for water, and enough bighorner for steak
For my values, I heard you'll die after 3 days of no H2O input, so that's the basis.
I'd go for 900 a day for FOOD, so I have to eat three times a day, but the prospect of death is a bit too much :/
As for sleep... one good sleep a day
Of course, I have the luxury of PC mods to do all this, but I just wanna hear your opinions