Considering older child summer program... any help? :) (xposted)

Hi-- I'm hopping over from the Guatemalan adoption board. We have 3 kids-- one bio son (age 11) and 2 beautiful Guatemalan sweethearts (ages 2 & 1). We are considering hosting-to-adopt a Colombian child this summer. He/she would fall in the age range 7 - 11 (we would make sure that our son remains the oldest). He would stay at our home for 3 weeks this summer, and if he is a good fit with our family, we would adopt him (or her). We are still praying & thinking. We may wait until next summer-- when our daughters are a little older & more verbal & independent. Does anyone have any experience adopting older kids from Colombia (or adopting out of birth order)? Any advice? The child would return to Colombia in August & then we would travel to Colombia to bring him home when all is finalized. ANY advice/input etc is greatly appreciated. We know next to nothing about the process, etc. Much peace, Amy :)