I agree with Greensleeves. Our church sends a mission group to Uganda at least once/year. They brought sewing fabric once, but it is extremely heavy. The ladies where they go also use treadles. We have sent the little dresses several times, and they are enjoyed by the villagers. Our mission team always brings back handmade items to be sold.
A 3 year mission will be quite an experience. She will be an expert on what is needed quickly and will be able to share it with congregations supporting that ministry.
You are wonderful for helping her with ideas.
Dayle