my 11 birds (roughly half of your flock) go through about 50lbs a month.
And my 20-30 birds eat 100lbs in roughly 2 weeks.
But $2 where you are is crazy cheap compared to around here. When I drive around I see them for sale at $4 a dozen and if I look at Craigslist, more for the other farm stuff, they are around $5/6 a dozen. And the local grocery store has there eggs setting close to $5. I happened to take this picture to show my husband.
$2!?!?!?!

I was getting $5 for an 18 pack, family and friends only and will be raising my prices to $5 a dozen on that basis and more when I'm complying with all sales regulations for roadside stand sales.
Yes and fermenting will cut your feed bill in half. Here's more on the topic:
https://www.backyardchickens.com/threads/fermenting-pellet-feed.1287963/
Not unless the birds are wasting massive amounts of feed.
The savings from fermenting feed generally amount to the same savings seen when switching to a no-waste type feeder.
husband has been in the habit of filling several pans of food every morning for them and they gobble it up quick.
This is a situation that sets up massive waste as the hens scratch and compete for food out of containers that allow them to dump great quantities on the ground.
I prefer an old-fashioned metal feeder with a deep pan. This one isn't quite as good as the one I have now, which seems to have been discontinued, but it's close: https://www.southernstates.com/cata...gory=horse-livestock+poultry+feeders-waterers
There are a number of other designs that limit waste, both homemade and commercial. Some require the bird to stick it's head into a port to eat, others have some device to limit their ability to rake feed out.
Chickens do best when free-fed so that they have access to their feed at all hours of daylight. This can actually reduce waste because knowing that they always have access means that they don't feed as frantically and don't throw feed around so much.
But if you do use a measured feeding strategy it's imperative to feed in dishes that permit the entire flock to eat at the same time so that dominant birds can't prevent the low-status birds from eating.
Some people find that less feed is wasted when using pellets. Especially when using this sort of feeder with the plastic bars in the pan to limit raking: https://www.southernstates.com/cata...gory=horse-livestock+poultry+feeders-waterers
Birds also waste more when fed down on the ground than when the feeder is hung at the level of their backs.