What is the benefit to leaving the beer in the primary until it's ready to be bottled? And I'm not certain how to operate it logistically. e.g. If I choose not to rack it to a secondary, would I leave it in the primary for the same duration? How would I determine that it's ready to be bottled? I know that I should observe a consistent gravity prior to transferring to a secondary, are there any other methods? Intuition? Religious ritual?
There's a lot of info here about going with long primaries and zero secondaries. For the majority of brews, racking to another vessel, as I believe Yooper is [more accurately] calling it a 'bright tank' where it [essentially] just becoming more clear. This is unnecessary since the brew will clear up just fine if you leave it on the yeast. In fact, leaving it on the yeast cake will help remove any off flavors produced during fermentation (such as you get from some yeasts when you ferment too warm/hot). The more yeast it's sitting on, the better, and faster, this will happen.
TASTE should be your main tool once you've hit a stable FG. If it tastes great, AND you've hit a stable FG, then bottle/keg it up. If it doesn't taste right/great, leave it on the yeast. Depending on the OG, and what you're making, this can be 2-4 weeks. For higher OG brews, that are going to finish strong, and don't ferment in their ideal temperature range, this can take more time. I wouldn't have any worries about leaving a big brew on the yeast for a few months, if it didn't taste right.
I don't even look at a brew that's above 1.060 until it's been on the yeast for at least 2-3 weeks. Higher OG brews get 3-4 weeks on the yeast before I check on them.
Yeast does NOT work on a time schedule set by humans. You need to give them the time to do all that they will to give you the best brew possible. I know there are people that post up about being able to go to bottle/keg in 7-10 days, I don't see it. At least not with the brews I'M making. Even when I get a fermentation chamber online, I plan to continue with my current model. There's actually no harm from leaving a brew on the yeast cake for a few extra weeks.
Edit:
Oh, curious. If I were to make this next batch and not purchase another primary as you indicated... that wouldn't be a problem, eh? I would just let it chillax in the primary for a few weeks and check it every now and then? Sorry for the questions - I suppose I just started this endeavor using a pri/second for fermenting and I'm not confident yet otherwise.
Learning is fun
Racking off the yeast after X weeks is a hold-over from the dark days of home brewing... I'm talking about methods from 10+ years ago. Even the giants of the home brewing scene no longer rack into another vessel to 'help' their brew. Back in the early days of so-so ingredients, and questionable yeast, it was a more necessary method. These days, with quality ingredients, and really solid/great yeast to select from, it make very little (if any) sense. Yes, there are times when you'll want to do it, but those times are a lot more unique to specific styles of brew, or when you actually are racking off of one item, onto another for either more fermentables, or where you need to get off of a flavor adding element. Or for really long term aging, where you want to leave most things behind then it's often a sensible item. But ONLY once the yeast has done all it's going to, so probably after at least a month, or two. There are a LOT of things you can add into primary for flavor, so you won't need to go to another vessel to add them. Things like hops to dry hop, oak chips, etc...
Try an experiment some time... Brew two batches of the same recipe. Get them as identical as you can. Ferment both in the same room, same temps, same yeast, etc. Leave one on the yeast for the duration, and do your racking of the other one. After bottle conditioning taste both. At worst, you won't be able to tell any difference. At best, the one you left on the yeast longer will be better. I would also say to leave the bottles in the fridge for 4-5 days (or longer) before you drink them. The longer you leave a brew in the fridge the clearer it will be. Pour into a room temp glass (not chilled/frozen) and you'll have something really great.
Experience teaches us a great deal. Read up what others are doing for the same style set you're brewing. If people who have been brewing for some time, and are getting great results with a method. Such as Revvy with the no secondary model. Then try them out for yourself. I've gone long primary since batch #3 and have seen great results. I can't imagine going to the old method again. Especially since there are logistical benefits to NOT racking to another vessel. For one thing, reduced chance of contamination when leaving it on the yeast. For another, less things YOU need to do. No need to sanitize the hardware, from racking cane to vessel, plus time NOT spent doing something that's really not needed.
I'm fermenting my first brew in a corny keg right now. I see that as the ultimate primary at this time (no need, room, or budget for a conical). Completely light blocking, no chance of getting oxidation, easier to move (when needed) and smaller foot print. Plus, when I build a fermentation chamber, it will be easier to fit more into it than if I used buckets or carboy's...
Damn, didn't realize how long that was...
