One thing to consider is how much you will use the rolled hem foot. I say this because I have found such a learning curve to actually making them work that I find it easier to fold by hand. If this is a one shot deal, decide how much effort and money you want to invest in the project. If you are going to be doing a lot of it (by _your_ definition) then it may be worth getting the hang of those beasties. I never found it worth while... nor did my professional seamstress wife. But you may love them after you figure it out.