LOL..... I have a HUGE gap in my kids, but it wasn't planned, and it works out great. WE have 2 biological kids, who are now ages 18 and 21. They are both girls, and the BEST of friends. Then, we also have 2 younger kids, who are not our biological kids, but are our nephew and niece. We are their Mom and Dad though, and have had them for 6 1/2 years. They are now 10 and almost 9. Our younger 2 look up to and adore the older 2. It's almost like having 2 more Moms, only the older 2 never had the responsibility of being Mom. The older 2 will take their younger siblings out to do things, BY CHOICE because they WANT to, and they also do it to help me out from time to time. The older 2 are very protective of the younger 2, and actually my 10 yr old son is protective of all 3 of his sisters. He checks out any guy that the older sisters bring home, and has to give his "approval" The older girls actually want his opinion too. LOL! I am a very lucky Mom though, and I know how different this could have been. When we decided to "take in" the 2 little ones who at the time were 2 and almost 4, we sat down and asked our girls how they felt. We explained what it would mean and how the choice would change their lives. (good and bad) We decided as a family to move forward and have the 2 younger kids join our family, and because we included our girls in the decision, I think it made a world of difference.
Now....... that being said, my older 2 are both out of high school and are in college now, so I would be an "empty nester" by this point if I had all of my kids around the same age. Hmmm. I am not sure if I am really ready for empty nest, but the idea of having a day off here and there IS enticing. LOL! I guess the only real drawback I can see is the length of time we will be parenting, and then the fact that we will probably not get much of a break between parenting and being grandparents (someday) so that would be rough. I do really look forward to having some alone time with just the hubby and me. Well, maybe someday...............................