Nice furniture, mcvltd.
You can make cushions with wrinkles from 4 individual surfaces, and then create a solid from them. Remember that create solid will make a solid even if the surfaces over extend each other.
You can make the hills and valleys with node editing on surfaces or drawing a grayscale image to use for Heightfield.
You could use a sweep1 and a circle (curve) for the piping.
Each pillow could be 2 edited surfaces, mirrored and so the edges overlap, and then create solid will trim them. Just remember that there can’t be leaks. You can bend them as you like with cage editing.
The cabriolet legs are going to be a bit of work.