How to convince your S/O to have another baby

Ok so me and my husband have a 4 year old. She will be 5 in June and I don't want to wait any longer to have another baby. I don't want my kids to be TOO far apart in age. I am ready to have my next child but he is NOT going for it. His main concerns is finance and we are honestly not doing bad at all. It seems like he's just scared that his life will be completely taken away over having more kids..but we are married and idk why he would feel this way. He claims he wants another kid "eventually" but I'm about to be 28 and I want to atleast have my next one before turning 30. What could I say or do to convince him to have another baby?! Please help!