The Bustle is not complex. It’s a hump-backed skirt with 7 bones, and a back brace. I used a not so cheap white cotton fabric. It is absolutely worth it to not be cheap about the fabric. It took about a day to complete. Here is the result.
I gathered the flounces by hand, and trimmed them with white cotton cluny lace. I am very careful about not using modern, man-made fabrics, because they really do affect the feel of the clothes. There are seven bones: 4 straight across the back, 2 bones at the hem that cover the complete diameter, and one that arches between bones 1 and 2 at the top. I nicknamed that one the “gothic arch.” That bone adds a great deal of stability.
The flounces are sewn into the side seams.