A question, can someone still finish a 15 day goal, with just 2 ovens, instead of the 3 it requires?

Because I have very little neighbours to depend on (I just start) and I do have the gems to spend to not need a 3rd oven, or get past the step without having to build a 3rd oven.
Is it possible to complete a goal without having 3 of the same ovens/stoves it requires?

I know it will be harder if there is a way, however I don't have the neighbours (or as many) to depend on yet.