I want another baby

I keep asking my husband for another baby and it seems like he's just not ready he keeps saying he wants us to buy a house before we have another baby and I absolutely want to try for a girl we already have 2 boys 2 and 4. This is just something I really can't shake off. I understand where my husband is coming from but as his wife I don't think he should shoot down my request as fast as he did. He wants to wait 3 years but I just don't want to what do we do ? 😩😩