Here's the best counsel I've ever heard on this topic:
Don't have another child if it will negatively affect the attention, care, time, and physical resources available to your two existing children, who are here at your bidding, after all. In your case, it will serve your marriage to also take your husband's financial anxieties into account. His needs MUST be part of any good decision. These are unsettled times, and his concerns are probably legitimate. And this is a conversation you could have in another year, or two, or four.
I'm guessing that you'd most like to hear from moms who agree with your desires. But I hope you're also seeking a diversity of opinions that will help you make the best possible decision. So here's mine:
Longing for pregnancy and/or babies is a much-too-narrow reason to bring more kids into the world. Hoping that things will take care of themselves can happen, but often doesn't. And at 62 years old, I am watching shocking changes in our environment, and can see staggering challenges mounting almost by the year. I think it's acceptable to replace ourselves with one child each, but beyond that, we could be fulfilling our desires now at great cost to future generations.
There are useful ways to redirect that longing into helping children who need help now. I've known families who found adoption to be a delightful and satisfying alternative. I hope you'll at least consider other possibilities.