How to persuade my husband to have another baby?

I always wanted to have a big family and it is something I've told him since we were dating. I want 5 or at least 4 kids. We even had names picked. We have a 2 year old and a 2 month old now and he just keeps telling how he doesn't want more children and that I should speak to my Dr to get prepared for that. He is saying it is really hard and he is thinking about the future and how we can offer them a better life with just two cause of the cost of living. He has valid reasons but I feel heartbroken 💔. Having many children has always been one of my biggest dreams and desires in life. This first two months have been hard with a newborn and a toddler. He keeps telling me "How can you think about having 4 if you can't even handle 2". I know it is tough and some days I just cry cause is hard but I know this is just a phase and I'm willing to keep doing it to have my family. I'm trying to get him to agree to have at least one more!! I understand he gets tired and it is a lot of work but I feel like he is taking away from me something I have always wanted and dreamed about 😔