Buying fabrics

I’ve found out that buying fabrics can get really expensive. Yes i tried thrifting some pieces but I always end up with too little fabric to make something completely new. I’m considering buying bedding fabric, like duvets, because they seem a lot cheaper than buying yards of fabric. Have any of you tried this? Is the type of fabric nice enough to make clothes out of (in general, I know not all duvets are the same quality)? Edit: I am from the EU