Another lead

So we got a phone call yesterday about an adoption lead. There is an agency in Utah that is facilitating an adoption in Oklahoma. The birthmom had a 3 year old girl and a 4 month old boy that she wants to place together. Apparently these situations are harder to place (older kid and a baby). Ellie would be 10 months younger than the girl. We are thinking about it. It is a LOT of money (private agency). Ideas? Birth order disruption?