bluGill

According to Wikipedia there are 2,338 Aldi’s in the US, and 614 Costcos. Aldi also has some other brands though I’m not sure how they compare. Of course location matters, depending on where you live you will have access to different stores.

Eggs have gotten expensive lately. Still worth getting if you can find/afford them, but probably not as useful today as a few years ago, or in a few years.

The food shelf I volunteered at a couple weeks ago says peanut butter is one of the hardest things for them to get (I assume something like caviar would be harder but that isn’t something most people eat so who cars) . So might not be good advice. Nuts tend to be very expensive in general so probably not the best advice, but might be useful for variety when OP can get it. (technically peanuts are not nuts, but in this case lumping them together makes sense). You can make your own nut butter fairly easially in a minimal kitchen if you can get any nuts (including at a local park where they are often ignored)

Try different types of potatoes. The common “Russets are rejects from the french fry industry”. (direct quote from a Potato farmer I met a few years ago - I’m guessing he doesn’t grow Russets and always take the quote with some salt). Different types of potatoes work well with different cooking styles.

(everything else I have to say has been well covered by others)

Aldi is just as cheap as Costco and no membership needed. Plus the potions are much smaller which means less waste if you are not a large family. Aldi is likely to be nearby as well unlike costco which tends to be only a couple locations in a large city. Only downside to Aldi is less selection, we use regular grocery stores for things we can’t get at Aldi.

They won’t. While it is unknown if there is intelaigent alien life it is known that none is anywhere close. When distances are measured in tens of lightyears for close thing they can’t get here and back in time to make a difference. Most distances are measured something much larger. Just the milkyway is 25 thousand lightyears to cross.

note that are farthest detectable radio waves have gone maybe 100 lightyears: odds are your are dead before they know we are here.