Good age gap for baby #3?

Me and my husband have been talking and we’re thinking about trying for baby #3 at the end of this year. We have twin boys who are turning 2 on July 28th. So they’d be 2 1/2 when we start trying. It took 5 years for us to conceive the twins. Would it be a good age gap if we were to end up pregnant within the first 6 months of trying? Or should we wait until the boys were a bit older?

Like in your opinion what’s a good age gap?