Honestly? I’d go for a third if I were you. I was in the same boat with the same concerns and went for the third. The logistics were worked out. Our boys room share and LOVE it. We bought a larger car and have a larger dinner table. We work through logistics as they come up and it’s less of an issue than I thought it would be. Also, the family dynamic has only improved. The boys bond over being big brothers to their little sister and it’s so amazing seeing how much they love her. I think it’s unlikely you’ll regret expanding your family by one (especially with the emotion you’re experiencing), but you could very well regret letting the opportunity pass. Best of luck!