Dan_29:
Thanks for your question. Many candidates find their work or personal stories change between the time when they submit their application and the decision time of the Admissions Committee. In your case, with the decision less than a month away, I feel like you have several options.
1) You do not mention if you have already interviewed with each school. Some candidates use the interview as a casual forum to update the Admissions Committee of these type of changes. The most notable change is your formation of a new business venture (with land purchase, client acquisition, etc.) Without knowing more, I can tell you that if I were you I would expect them to ask why you are doing this if you expect to go to school in nine months' time?!?! Having a solid explanation for this will be key.
2) If you have already interviewed, you may want to write a short paragraph explaining the significant changes (especially new business contact info, title, reporting structure, etc.) and email this to the schools. A short intro sentence stating that you wanted to bring your information up to date is probably all that is needed.
3) As for the verification issues, I hope that you supplied the Admissions Committee with the appropriate contact information for various people when you applied. This probably will not be an issue, but if they can avoid talking to the hostile business partner, I am feeling like it would preferable.
Hope this helps,
Jennifer