The wheels are plastic! That fact is really going to limit what I can hang on this.  I’m trying to cover two electrical panels and a crawl space access and the thought was to use a large panel door, but I think that over time the wheels would fail with that much weight, now I’m looking at a large artist canvas that I can hopefully fortify to attach to the wheels. 
If you have something lightweight to hang on this, I think it’ll be fine, but look for something all metal for heavier doors.