Backdrop for my Paper Theatre

I've just made a backdrop for my paper theatre. It has been ages since I last paint, and I seemed to have deteriorated. Either that, or the material was too small for me to handle (25cm x 12.5cm using acrylic). Anyway why did I do this "backdrop", you may ask. It was actually a draft of some kind, which I intend to make into a real backdrop of size 10m by 5m for my Chinese opera troupe. However, I don't think I can handle a painting that big on my own (I don't even have such a big uninterrupted floor space to start with), and outsourcing to scenic backdrop painting companies locally could be costly too, I guess. What's more I'm doing not just one, but 3, or even up to 9 if budget allows. Maybe I'll have to look for such companies in China, but then again when the outsourcing company is far away, it is hard for one to supervise the progress. If anyone out there has got any recommendation on cheap and reliable scenic backdrop painting companies, do drop me a message!