Okie, I did something similar to what you're talking about but had to condense my timeframe. I was working, Mom was here for a time, and the stresses took a toll on me and I ended up not being able to work. I could feel it coming, so I pushed to get my machines, a thread stash, etc. before the day came when I had to quit working.
I have over 400 cones of embroidery thread; I keep it away from direct sunlight and run a humidifier in my sewing area in the winter. So far, so good! I keep my fabric away from sunlight as well, bringing it out when I want to use it and I do keep some on a shelf in my sewing area. I'm not concerned that the fabric will be a problem, as I've been collecting good quality fabric. I have 60 year old antique quilts that are hand pieced and quilted; they are holding up well!