Try to develop your professional persona. Practice things you'll be saying a lot. Speak addresses out loud as your looking at a new property, town names, cities... Whatever you're going to be taking about. This won't keep you from stuttering, but over time you'll gain more confidence in what you're talking about. I'm a software engineer, I work a lot on my own, but I collaborate a lot and talk in meetings. I've tried to build my own mental image of myself that I want to project in a professional environment and project that. Over time I've been able to build confidence in talking about a lot of topics, and they are much easier to discuss now. In your field maybe you have to explain hoa fees. I think about what most clients ask about them, write out a few points for yourself. And practice talking them out a few different ways. What you're doing is teaching yourself how to give an impromptu speech that you already know by heart. For me, I'm often more fluent when I'm reading or reciting something I know well, rather than 'ad hoc' conversation.