He does have a point though. If your business model relies on getting new clients to visit you in your "office" I would not work on a boat at all. First, some people will not get on a boat no matter what. Second, you may have to cancel a lot of meetings due to weather even if the weather on land is perfectly fine or only slightly windy. And third some clients will think that you are not trustworthy and that you are on a boat simply so that you can get away at a moment's notice.