Refine The Design. Determine the details of cut and style for the basic items. Choose accessories to enhance the basic look. These could include hip scarves, overskirts, stomach drapes, detached sleeves, armbands, ankle bands, gauntlets, hair accessories, headdresses, turbans, etc. Whatever you decide to do, it's best to keep the design simple.
Complicated designs are more difficult to execute consistently.
Use readily-available fabrics and trims. Or, purchase enough to make a few extra costumes at the time you buy them. That way, when new members come along in a year or two, you'll still be able to get or provide the necessary materials to accommodate the additional people. The sequined fabric used to make the sleeves and overskirts in this Troupe Wasila costume from 1991 were beautiful, but when the fabric was discontinued we were unable to get more for new members. Allow all suggestions to be heard and discussed.