Advice please

KayCee
My husband and I are 24 and 25 years old. We have a 7 year old daughter and I really want to add another kiddo to our life. Our daughter always says stuff like "I wish I had a brother or sister to play with" and it breaks my heart. My husband said he would love to have another baby but is worried about money. 
Our money situation is perfectly fine we have plenty to welcome a new little life. I guess what I'm trying to say is what do I say to our daughter and what can I tell myself to basically get over the fact that we won't be adding another baby?
I've been asking my husband for 3 years and he says the same thing every time so I know it's not gonna happen.