good looking pup there, best of luck with the sale and well done being honest,
three children under the age of five is hard enough work without a young pup, take some time to get over losing the terrier, maybe get an older dog to fill the gap when your ready other wise i'd say to wait til the kids are older
i admire you for being honest to yourself to know your finding it difficult before the pup is too old, too many people struggle to follow their pride and keep going til the pup is 5 months old or older when people are less likely to take a pup on as your taking people's problems al