Hi Dean,
I use a white/black reversible pop-up background with train (both white train and black train). It's 7' x 7' with a train that comes forward about 8'. Folded its about 3' diameter and I can carry it into a house (or village hall or unit or whatever), open it up and voila I have a background. I use a large background clamp with a hole drilled through with a wingnut fixed inside which sits on top of a fully extended Konig Lightstand to hold the background up. It can lean against a wall, but not confident it will stay.
I'll be honest enough to say it is a bit flimsy and what I really need to do is get another lightstand so that I have two supports to solve this and sometimes it is a buggar to collapse it but it does the job.
It's hard to make it stand up so that you have no creases, but possibly with a bit of clear pvc on the floor and that second support it would work.
If you aim to only do black/white work, dont mind a bit of PP to get rid of creases and happy with the size, it is deffo worth it.
Just for consideration, in the long run and looking at my ideal setup I want to have a proper background support system, with selection of background such as black, yellow, blue, brown, white whatever, but until I have spare funds to invest in a proper non-chinese-cheapy-system I'll make do with what I have.
Hope helpful.