I have loved and collected fabric, yarn and thread since long before I even considered quilting. Quilting has helped narrow my focus, but I see the infinite possibilities in all kinds of fabrics, not just traditional quilting cottons. I do buy fabrics for specific projects but mostly so I'll have it when the creative urge strikes, which often happens in the middle of another project.
Since you are planning on moving soon, I would agree with those who have advised you to hold off on stash building until after you move. I would also suggest that you consider what type of storage you are going to want for your future stash. Are you like me and want it all out on shelves so you can easily see what you have or are you like my daughter's friend who wants everything behind cabinet doors or in a tupper?
Either way works, but which will make you happier?