I have three kids, we've always had two in diapers. It's actually not a big deal. There are 18 months between #1 and #2, 20 months between #2 and #3. I think you are greatly overestimating the costs of diapers and food. I used organic formula for my son, who drank 48 ounces of formula a day-much more than the average baby. We spent about $150 a month on formula. We also used more expensive eco-friendly diapers and they were only $12 a pack. Even when we bought baby food for him we only spent about $60 a month. In all, we spent no more than $300 on baby products each month. There are also cheaper options, especially for diapers. The Honest Company has great organic and eco-friendly baby products and they are pretty cheap. A month's supply of diapers and wipes is only $79.95.Taking care of two that are close in age is not difficult either. My older ones have always been great helpers and have generally been very patient if they had to wait while I took care of the baby. Even taking care of three kids 3 1/2 and under isn't that stressful or difficult. My kids all adore each other and the older ones do their best to entertain my baby if she's fussing while I'm trying to cook dinner or clean up a mess. It has never been hard to give each child the love and attention they need. I'm enjoying my new baby and all her baby moments just as much as I did with my first.Adding more children to your family is always difficult, there are always expenses. In my opinion, it's easier to have them all little at the same time. They play with the same toys, they watch the same cartoons, etc. When there is a bigger age gap it gets more difficult to manage everyone's different needs. My kids are also absolute best friends. I've seen many families with kids farther apart in age and they grew apart as the older one got older but the younger one was still too young. It seems to be a particularly big problem with girls. My husband and his sister are 4 1/2 years apart and they didn't start to become friends until they were adults. My mom and her younger sister are 7 years apart and they still hate each other.