Photograph first. Transcribe once.
The photograph is the emergency measure and it takes an afternoon: every card, flat, in daylight, front and back, before another winter of the tin being opened with floury hands. Ballpoint on index card has a shorter life than anyone expects, and the cards that get handled most are the ones that go first — which is to say the recipes the family actually cooks.
Then you type each one in, once, and the photo stays beside the transcription rather than instead of it. Nobody frames a transcription; nobody cooks from a photograph of slanted cursive at arm's length over a hot pan. Heirloom is built on the assumption that you need both, permanently, and that you will only ever have the patience to do the typing a single time.
The card