I am doing elements with one of my characters and as an example, the quest has two parts, one with an alternative and the other does not. It is required and needs 6 workshops upgraded to level 28. Luckily I have 6 I can work with. In another city I have sold workshops when I won Magic Workshops. I have found that not as many workshops are needed now that other buildings won in Events provide supplies. I can't be the only one who has this problem.