I've been grain-free (with a few hiccups) for a couple months, but the family just joined a week ago.
In that week, we have run up the grocery bill so that as of April 17, we've spent the whole month's budget already. Sigh. I really don't know how we're going to manage this, especially since we had other expenses this month (couple dentist visits, heating oil fillup, etc.). And if we have to dip into savings to pay for our food, that's just not gonna work.
(Although to be fair, $50 was spent on a CSA payment and it doesn't start till next month).
I had kind of worked out a decent, if monotonous, grain-free diet by the time the family joined, but it wasn't something they could have really eaten. DH went through withdrawal for days as it was, and my diet had gotten to be a pretty decent, relatively low glycemic diet with few substitutions. I mean, I wasn't just swapping wheat for corn. But now, in an effort to feed my family, I've swapped wheat for corn. And I don't think that's exactly ideal.
It's hard because we all want different things now. DH and I would actually be happy on a diet of franks and beans for dinner most nights, but DD won't touch those. DH and DD are hooked on corn bread that I bake (no flour or sugar) but I don't feel good after eating it. Plus DH sneezes like a maniac when eating it, but he doesn't care.
While both DD and DH have now adjusted, to a point, to wheat-free eating, I haven't noticed any wonderful changes in either (like I did for myself). So maybe this is kind of a waste for them. The big benefit seems to be that DD in particular is taking in a much wider variety of nutrition. For example, she will actually snack on raw veggies, whereas she would not even consider it before. But her protein intake has not increased, nor has her caloric intake AFAIK (she is low weight and I would like her to gain). She's held steady on her weight and not lost anything, but she still seems to have limited appetite. She will get so she's "starving to death," I will feed her, and then she'll eat 2 bites and be full. Drives me BONKERS. And that doesn't seem to have changed.