19 years, 5 months, 21 days, 16 hours, and 23 minutes.
If the material world survived, living in a large city, I could probably scavenge for non-perishable foods for quite some time.
If it's a nuclear wasteland and I'm fending off mutants, I guess it depends on how many caps and nuka-cola I can find.
This one has gotten me through some some patches, especially for a couple of specific things. One has completely turned around, and I'm glad I waited it out. The other still creates some stress, but there are rewards along the way.
Edit: Edited some repetitive lyrics for brevity