Howdy Steve! Enjoyed hearing of your WA adventures
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My answer below contains some stuff that you already know but thought I'd throw in the extra detail for others who haven't had as much experience....
I think your original question can't be easily answered as it poses so many other questions, the most important being, "What are you brewing?"
I think I'm in the same boat as you on refrigeration space (as in bugger all) so here's a few things that I keep in mind or know when trying to improve my, 'brewery efficiency." That is, getting quality beers from the fermenter to the tap asap. I'm also making the assumption you are doing all-grain and I have only done around 15-20 AGs...
1. The Fastest Beer from Fermenter to Tap: Many ale recipes can be fermented for 9 days, racked to keg, force carbonated and drunk a half hour later. Predominant disadvantage will be clarity. Filtering or even sometimes 12 hours chilliing will solve this. From tasting other brewers' beers and my own, their are heaps of beers you can brew like this and time will not often improve the flavour though at least a day in the keg seems to often make a difference. Recipes like this are great for us!
2. A Slower but Clearer Beer: Ale recipe like above. Primary 7 days, secondary 7 days, then into fridge for 2 days will usually give you a clear beer. 7 days in fridge virtually guarantees it even without the secondary. There are many compromises available between this and 1 above.
3. Lagers - You are stuffed here from what I know or have been told. 3 weeks cold conditioning bare minimum. 6 weeks preferable.
4. How to Lager Lagers! - Should you lager in the cube or in the keg? Ross started a thread on this question some time ago. I'm sure I would have noticed if a definitive answer had been offered on this question but I don't think there was. Personally, I'd imagine that a kegged and carbonated beer would lager better but I think that for people in our position the taste improvement wouldn't be justified.
Unfortunately I'm a lager guy so fridge management is crucial. You hopefully have seen a pic of my fridge set-up but if not, one fridge allows me 3 beers on tap, 2 ales and one lager served via 2 Broncos and one fridge tap. It also allows one ale and 2 lagers to be cold conditioning not to mention a fermenter being kept at lager temps. And I'm in QLD!
The key for me currently is finding ale recipes that can move from fermenter to tap as quickly as possible producing beers that both I and visitors enjoy. The more I succeed at that, the more room I have to play around with lagers. The first of these is just about ready.
Whoops! Looks like I've written way too much - again! Sorry mate.
PP