It's awesome that you're thinking of all of this now! Seriously, it's good to get some of the kinks worked out ahead of time. You'll probably get a mix of responses, since we all do things a little differently and have different circumstances (water type, access to laundry facilities, climates, budgets, etc.), but I will share with you my experiences!
Diaper sprayer: Never used one, so I have no recommendations. But I've seen tutorials on making your own, like this: http://gidgetgoeshome.com/2008/08/25/diy-tutorial-make-your-own-diaper-sprayer/ So, that's an idea that might be cheaper and feasible for you. We always had a laundry tub, so what we do is dump and scrape as much as we can into the toilet, then rinse in the laundry tub and leave the dirty diaper hanging off the edge until wash time. Same with our cloth wipes that are soapy or dirty: rinse as best we can, hang till wash. I might look into making our own sprayer this time, though. Seems like a good idea!
Detergent, etc.: I started out my cloth diapering career using a tablespoon of Dawn in the wash as recommended... somewhere. I wouldn't recommend it. There are better options. I've also used free and clear detergents of different brands (Tide is not recommended, but I forget why), and soapnuts. Loved the idea of soapnuts, but found them confusing. In the end, I was using Nellie's detergent and that seemed great, so I intend to get more of that for this baby. But I will admit, I have had stink issues with my diapers, and can't seem to strip them well enough for older babies/toddlers to use. That might be related to the Dawn and other mistakes I made along the way, I'm not sure! But it seems that once my kids got to about two-and-a-half, their pee stank too much to continue with cloth, so I switched to disaposables with both my boys at about that age, sadly. I'm plnning to try some new stripping ideas on my diapers before the baby comes to get them up to par. Though, they were fine for my second until he reached that age, so who knows? Anyway... As for wool dryer balls and the like, they are a-okay! As long as your child is not allergic/sensitive to wool, that is. No exerience with wool and lanolin, so I can't comment on that. I'm intimidated by the work involved, and I really like my waterproof, PUL covers. ;)
Dirty diapers: I use a kitchen-sized trash can with the lid that goes up when you step on the pedal as my diaper pail. Lined it with a large wet bag/diaper pail bag, and put in all diapers together until they start solids, then just pee diapers after that (the poopy ones, as mentioned above, are rinsed and left to hang on the laundry tub). I don't soak them, per se, but I do a pre-wash on cold to get rid of excess soil and pee before the hot wash. Always washed every insert and prefold totally before re-use, but I would reuse covers unless they got super messy. We just leave the damp one on the edge of the change table to dry a little and cycle between two for a while, until soiled or a new day. With wipes, I will reuse until I use soap or I'm wiping poop. I have a basket full of about forty wipes (just cheap baby washcloths), so I don't try to conserve much. If I just use warm water to rinse after a pee (we have a basin we fill with fresh warm water at every change), I will reuse it again at the next change. But, if it's been a while and I use soap, it gets rinsed and hung until wash time. My system for dealing with poops is: wet washcloths until all poop is gone, then soapy cloth, then rinse with fresh cloth and plain water. I don't stick the poopy or soapy cloths back in the basin ever, as I think that's gross. :P Poopy wipes get rinsed along with the diapers.
Drying: I live in Canada, so yeah — the clothesline season is too short! I use the dryer in the colder months, but always hang my covers and outer shells of pocket diapers to dry on a drying rack in my basement. I may invest in another, bigger one of those so I can hang all of them at times, though to be honest, that takes a long time and I usually do laundry when we're down to the last diaper and need it sooner, so that might not happen!
I hope that helps you some. Again, I'm sure you'll have some varied answers and, in the end, will need to try some different strategies to figure out what works best for you, but this gives you an idea of what another cloth diapering family has done.