2 days here.
1st day, 5 guys ripping the old shingles off, repaired/replaced 2 sheets of OSB around chimney and vents,
ripped off 210' of gutters around the perimiter (hip roof, 1400 sq ft, 2 valleys).
Replaced ice dam mat 6' up, new valleys, starting shingling (about 1/4) the first day.
Installed new ridge vents second day, finished shingles, and added 7 roof vents (no ridge vent).
3 guys did the shingles, 2 college kids did the clean-up.All were english speaking anglos.
Gutter guys (2) came a week later and finished in one day.
5 left-over packages of shingles. I took 3 for the kid's/grandkids playhouse.
Took me the better part of a day to redo it (tear off, tar paper, shingle).