Welcome, Mongoose! There's lots of flexibility within this group (some strict whole 30, some whole 30ish, some reintroducers, some Paleo, some keto) so pull up a chair and join in!
One thing I've noticed is that my grocery bills are stabilizing (after really spiking at first) now that I'm NOT buying other foods. I'm not buying junk food, I'm not stopping for fast food, etc. And that would include not buying that stuff for the kids either.
When I think of what used to be on my grocery list: potato chips, pop, ice cream, cookies, sour cream, boatloads of yogurt, cheese (oh the cheese), cereal, taco chips, candy treats,
And my grocery list now: boatloads of fruit and vegetables, huge variety of spices (all bought in bulk), frozen fish, juice, nuts, eggs, canned tuna and salmon.
Another tip I've picked up along the way is to serve rice for the non-Whole30 members of your family. I serve rice A LOT to fill up my large family. Potatoes are a wonder food for the 3 of us in my house doing Whole30 -- we have them quite often and my daughter claims they have cured her of bread. I am so surprised that I no longer crave bread!
Sorry if this is full of typos -- iPhone!