I have spoken to the Caranex chap a few times over the years.
He is always charming, patient and really helpful.
The 9x9 is just about portable but, yes, large.
The 12x12 is a massive comittment to transport, chaphandle and erect.
I hope to come up with a shortened version this year (time permitting) that is half as long as the 12x12 and uses 1/3 of the poles so provides a decent space which works with ambulance or 101 (similar height) and looks the part.
It's not as easy as just cutting a 12x12 in half, the window needs adapting either side too.
I've just remembered a Gumtree post to share, get Vinny and the cheque book on standby.