I have a non-chain fast food place near me, doesn’t even have indoor seating, just a small waiting space (holds maybe 10 people if you pack them in such that the personal space bubble is tiny) and some picnic tables, but no drive-through.

They’ve managed to keep prices pretty low; Big Mac or whopper equivalent is $4, for example and I think fries are some 2.50 for the large. While that does add up since everything is ordered individually, the quality is superior and it’s local-family-owned, so well worth it. And it’s very very popular even without the drive-through convenience. The local McDonald’s hardly gets any traffic by comparison.

Just goes to show it can totally be done, if not for outright greed.