I've seen people fire off the first thing that comes to mind in a text message in a business setting and almost always realize they weren't as precise as they wanted to be and have to attempt to correct themselves with follow on messages. This mistake and ensuing retraction almost always sours the deal.

Edit: addendum (I'm aware I'm doing exactly what I just made a case against)

Mine, and the Court's right now, expectation is that written communication does not need to be immediate. And since you have a chance to think through what you'd like to write, your first message has no reason not to be precise and correct to your intentions.