I'm short on wall space too. So I started putting fqs on their sides, in a clear tote, under the bed.
DO NOT DO THAT! They breed under there!! I ended up with totes under 3 beds.I had to start all over with a new plan.So now, I have bookcases full of fqs, and yardage that I have rolled up on those comic book boards. Much easier to see what they are up to that way.
I did learn that I must cover the bookcases tho....to keep the fabric dust & light free.
If you are hanging yardage on hangers in the closet, don't forget to cover them (maybe with those dry-cleaning bags or something) otherwise, they can turn yellow at the fold. & If you don't refold them once in a while, or use them up, they can develop permanent hanger creases.