It totally depends on the wild yeast in your area. Apparently mine suck, but other regions (like SanFrancisco) are famous for theirs. But I don't use any bread yeast with mine. I did use my old sourdough starter with bread yeast, and then it tasted really good. But on its own it was way too sour, like bad sour. I've been working my way towards consuming only sourdough grain products because it's supposed to be a lot better for you in a lot of ways, but at the moment we're eating store bread. Spring is not a good time for me to do anything significant in the kitchen, and I figure store bread is better than fast food!
Heck no... I've only ever fed mine twice in a day probably four or five times ever. It's really simple- more feedings = less sour, less feedings = more sour. BUT you can be lazy and still have it be less sour, you just have to feed it frequently for a few days, not every single day. And I don't ever through away my extra, either. I either make pancakes, crackers, or I freeze it.
Garlic isn't that expensive here, either. It may LOOK expensive because it's like 3.50 (ish, I can't remember exactly) a lb., and for most produce that's really expensive. BUT yesterday, because I've never actually seen what a lb of garlic looks like and I needed more for the chickens/dogs/cats, I put a bag on the scale and filled it with, more or less, a lb of garlic. It's a lot- probably 15 heads (but I didn't count). If you're going for a clove per chicken per day it would still get pricey, but even then I think it would be a worthwhile investment. Personally I'm going to go for a head per bucket of feed, which for each pen lasts about 4-5 days (except the turkeys who eat that much in about 2 days, but I figure they need more garlic because they're bigger and supposedly more prone to disease). But because I didn't want to suddenly put them off their feed I started with 2 big cloves per bucket, and I'll gradually increase that. They didn't seem to notice the difference, and a few of them even pounced on the junk I dumped out of the garlic press, so perhaps they're more in need of it than I thought. Slowly but surely I'm moving more towards the ideal of how I want to keep my chickens, though, and this was another big step.
I also put together my natural animal care kit yesterday. Most of this stuff I had, but it was scattered everywhere, some in the house, some in the coop, some in the shed, and I was getting annoyed with trying to find stuff all the time. So I had this old cooler that the handle broke off of (a small one) and I put in the following- my lb. of garlic, brewer's yeast, blu kote, neosporin, molasses, tabassco, bag balm, betadine, boric acid, lutein (for cats with eye infections, it's specifically for herpes infections), my coconut oil/lavender antiseptic balm, and my garlic press and a pair of scissors. And yes, blu kote and neosporin aren't horribly natural, but I only bought the neosporin (because I didn't have any, we don't use it on ourselves) in case the lavender balm turned out to be a bad idea. It'll likely sit there until it expires and get thrown out. And I love blu kote, not because it's antiseptic but because it, at least in my experience, keeps the other chickens from bothering a wound. I even swabbed a little on the wounded chicks' heads because the other chicks were starting to peck them. Is there anything you would add to have on hand (the few things we use that keep well, that is- that limited my selection)???
Another thing I've done recently was plant a bunch of the more potent medicinal herbs (the common ones, anyway) right next to the coop in containers. I didn't net them or anything. I planted peppermint, oregano, thyme, sage, rosemary, and lemon balm. That way I figure they have it right there and can medicate as needed. And I don't care if they destroy a plant or two, but in my experience the only time they damage herbs is by pulling up a poorly rooted plant in the act of snipping off a leaf or stem. Last year my entire personal herb garden was totally available to the chickens, and sure they grazed it, but they didn't demolish anything like they tend to do with OTHER plants. I did fence it off this year though because it's in the same area as a few zucchini plants, and right next to a poor daylily they were keeping mowed to the ground.
I have the pampered chef garlic press and I like it. I don't love garlic presses in general (for cooking), although I can't put my finger on why. Well, maybe I can- pressing garlic makes it super potent because the more damage you do to garlic the more the two compounds that are responsible for the pungent flavor (that I can't remember the names of...) mix. I like sliced garlic, and it's easy to do. And since pretty much anything I put garlic in has onion in it too, I just slice them at the same time. So, since the garlic press IS super handy for putting garlic in the FF, it got relegated to the coop. I don't think it hurts my hand (but maybe I have a different model- they change things) and I really like the little brush/scraper thing that comes with it. A food processor or magic bullet would be no help to me because if it's not right by the feed I just won't do it, and my feed is in the shed.