My reason for wanting an average number of ownership years was to make a post that was useful to anyone reading it. My intentions will no doubt be different than many others. I imagine most people intentions vary from their actions throwing all calculations out the window. Maybe the salesman would be right, price per point is the only number you can nail down. The number of years can vary, MF's will vary, taxes will vary, renovation surcharges will vary and resale value when you decide to sell will vary. Price per point at a given location is the only thing we have control over. I think I'll find the best deal I can, at the location I want and enjoy it for as many years as I decide.
Thank you for your input.