their are probably more Homestead missions that you missed, once you clean all up on the homestead map some will show up in either boston or new york and once thats finished more will show up at the homestead.
here is a list of all the artisans, there should be at least 3 missions for each.
they level from doing their missions.
Godfrey and Terry - The Lumberers
Lance - The Woodworker
Warren and Prudence - The Farmers
Myriam - The Huntress
Norris - The Miner
Big Dave - The Blacksmith
Ellen - The Tailor
Lyle - The Doctor
Oliver and Corinne - The Innkeepers
Father Timothy - The Priest