There is no way I would ever leave town when I have chicks less than 8 weeks old.
I would never make such a distinctive statement as it precludes ever hatching eggs...we never know what will happen tomorrow, ergo we can never be sure we will be totally available to chicks for 8 weeks. Its a wonderful ideal, and there's lots of ways to achieve it...especially with hindsight...but we all must learn the mistakes we can make and move on. Hopefully we will have fewer variables in future, but we can never eliminate them all.