Ok I am having the hardest time getting three master builders. I have 2 huts, the love shack repaired, the brier clear and the sewing hut complete. What else can I give them to do? I keep sending them back to fix the huts but their level doesn't increase. Any help please.

There are still several large building projects waiting for you. You shouldn't have any problem getting master builders from those.

If you have completed puzzle#4 then they can cleat the vines

There are also other ways to force construction skill up.....

Well share my man share!