I don't think there is any bar to ownership if you are coaching the team in which you have an ownership interest. Because of the conflict of interest, Gibbs had to sell his interest in the Falcons b4 he could coach for us.
There is a long history of owners coaching NFL teams and, as late as the early 70's, owners coached teams (Paul Brown and the Bengals). I am, however, unaware of anyone more recent than Brown and don't know if the rules have changed.
Here is a nightmare scenario for you:
After the season, Gibbs and Snyder fight about how much control Gibbs has over personnel moves. Saying he watched and learned from Gibbs, Snyder steps in and attempts to coach the team in 2005.:vomit-smi
