Given that fully functional, albeit very small, terminus to fiddleyard layouts have been built in significantly less than 9 feet in 0 gauge, don't let that put you off . Whilst, perhaps, not really relevant to this thread, there are a number of tricks which can allow the space required to be shrunk quite a lot. There's no such thing as a free lunch, of course, but it's surprising what can be done.
Raikes Street, a notable 00 example of quart into pint potness, can be found here.