disagreeing on another baby

We are married and have a 10 month old and I have a 6 year old from a previous relationship. Both our kids are boys. I really want another baby but my husband is hesitant and I think it's mostly financial worries. He has a great job and since we had the baby I only work a few days a week. We were talking the other day about wanting to buy a bigger house in the next couple years and he seems to think that if we have another baby now we wont be able to do so. I just feel like I will regret not having another child but I don't want to make this some huge deal and him only agree and then resent me later. What do you ladies think- give it a few months and bring it up again?