The goal of these missions is not to use blueprints in which you did not create. The goal of missions is to prove your skill so that you can obtain badges. I would recommend looking at other's entries, not arguing here. You haven't even done anything productive since the argument.
You don't have to spend money on expansion packs. Many people use BP editing apps like
Koder - Code Editor for iPad and iPhone which I use because I am on iPhone.