From Dave Fitch:

5. PREPARE FOR A SUSTAINABLE WAY OF LIFE OVER A LONG PERIOD OF TIME. (as opposed to projected growth and financial sustainability after three years). EXPECT GROWTH TO BE SLOW, BUT OF MIRACULOUS VARIETY. YOU MAY START WITH 10-20 PEOPLE, EXPECT NO SIGNIFICANT NUMBERS FOR THE FIRST FIVE YEARS. IT TAKES FIVE YEARS TO BUILD A MISSIOANL PRESENCE. BY THE FIFTH TO EIGHT YEAR, GROWTH WILL HAPPEN.

Full article here, and the missional church related articles at Pomotheo.