Honestly, I would go with Family A. The fact that Family B `can`t afford` to pay your fee to hold the spot is a red flag especially if that is your policy and you'd be bending it for them. Bending policies right from the beginning is not a good idea. In terms of the baby of Family A, I am sure he/she will grow on you. I don't always get a feeling of "oh he's so cute" about babies during interviews, but once you get to know them, they become adorable I would never base a decision based on the "cuteness"factor " Thanks for posting honestly!