Used to stay for 3 weeks, since 2000... 5-7 weeks. Occasionally I'll go for a shorter stay but that means 2 weeks. Unless I have 9-10 days on the ground (excludes travel days), it's not worth it for me.

When do I work? Until I retired, I worked 55 hrs. or so a week, 10 months a year... teacher. Teaching is not for sissies!