I'm really bitter about the no magic bullet thing! I wish there was just one place I could go where stuff is consistently cheapest. I guess for a lot of people, that would be Aldi, but for me it's Market Basket. So that makes me feel a bit better! I felt like I was really missing something with the Costco/Aldi love all the time. (I have three kids, so probably's Costco's target audience.)
What OtherJen said. I'm glad you've worked out what works for you.
I've honestly been thinking about this a bit more since this morning, and realized something... geographic proximity to a port city probably has a far greater impact overall on local food prices than the grocery chains in the region, whether regional or national. Speaking as someone who lives in a pretty land-locked region, food's darn expensive out here, especially for a kitchen that does kosher meat when trying to feed someone who has celiac disease and can't do high carbs, which basically eliminates bulk bins.
We finally got WinCo out here a couple years back, but we're on the arse-end of their supply chain (being the geographically farthest from HQ), and due to the lukewarm turnout in the state (both employees and shoppers), it wasn't the wonderland we'd been promised. In fact, we were supposed to get a WinCo built not far from where we are, but between the development hell that plot of land has had and the state being... well... Oklahoma... that store was supposed to have been opened two years ago and the cornerstone still hasn't even been laid. We went a few times to the next closest, but the prices weren't that great overall (excuse the produce, but their produce quality created its own set of problems as salad don't freeze), and they're just too far away in the wrong direction of everything else to make it worth it for us.
As an example: Personally, we have to do a mix of Trader Joes (kosher meat), Sprouts (vegetation), Walmart/Aldi (canned goods - prices are a toss-up), Costco (staples, dairy, salad). We'd love to do farmer's markets, but they're only open Saturdays, and the closest is in the same area and direction as the WinCo. Similar with supporting local business, but they're either too far away or our budget can't handle it due to what we actually eat. There was literally a point in time nearly a decade ago that getting a Whole Foods and buying some of our stuff there actually saved us money, so that's an indictment of how off-beat our own dietary profile is from Joe Sixpack, how far the region has come with grocery options in the past ten years, and the increased availability of GF foods at the same time - thank you fad dieters! We didn't even have a Costco within 150 miles of us until earlier this year, and the addition of the membership literally shaved a good $50/month off our grocery budget. We also have three small regional chains, but none of them work much for our needs, though we do try and support them when/where we can. Honestly, I'd love if Costco carried kosher meat like they do out east, but the community's not big enough out here to even do frozen, apparently. So our big meat deals are Empire turkey breasts at $4.99/lb when TJ's actually carries them, unless you want to butcher whole chickens and lose half the weight to carcass at $3.49/lb. Needless to say, we don't eat much meat in this house.