Thankyou so much for your input ladies! We dont know anyone IRL with more kids than us so we have no one to ask advice from to either confirm or erase DHs concerns. And I can understand his concerns.

I think our biggest issue would be a bigger car. Currently we have a Ford Falcon we just about own outright and have a debt for the 5 seater Toyota Kluger that we love. I think we could trade in both cars (as we dont need two right now) and get a 7-8 seater car, or even just trade in the Kluger for a 7 seater Territory or Kia Carnival without being in more debt or ending up with an older car. We'd have quite a while to sort that out though.

As for exta curricular activities; currently we have the three boy in swimming lessons once a week on a sunday all at the same time. We pay $40 for it. Which is quite reasonable. An extra child would make it $53. Definately affordable for us. Eventually they obviously will pick something else to do and I will make sure when the time comes we have the money to afford it; but with 3 (possibly 4) boys the likelyhood of them doing the same sport is high, and with their age gap being so small (for the first 3 anyway) they would eventually be atleast 2 in the same age group team if not all 3! So its managable.

I think his biggest concern is that they wont get as much one on one time with a parent as he'd like them too. I dont feel thats the case, the youngest will get one on one time obviously because the others would be in preschool/kindy a few days a week; and once the new baby hits 10-12mths we become able to do things one-on-one or both of us with one of them because we can leave the baby with the other parent or a babysitter. In the end though, the two friends I have who grew up with several siblings dont have any issues with being one of four or more, they actually have fond memories of fun and companionship. I dont think how many siblings you have impacts that greatly on your life in the end. I dont think anyone seriously wishes they DIDNT have any siblings but alot wish they had MORE siblings.