Except you would still be more likely to target other parents in the same close-by neighborhood, which would lead to a lot of repeat "business", at which point

Except you would still be more likely to target other parents in the same close-by neighborhood, which would lead to a lot of repeat "business", at which point you would develop relationships with your neighbors with kids of a similar age. I mean, a business accidentally creating closer, friendlier communities is great, but I think it'd still be a financial failure in the end, because once you've met all your neighbors with kids and trust them, you can just friend them on Facebook and say "Hey, can anyone watch Timmy while I run to the grocery?"