Upwards of 7 years, is a limited visa and has to wait for a number to come up.
That type of sponsorship gets the lowest preference.
QUOTE
LIMITED FAMILY-BASED
Family First Preference (F1): Unmarried sons and daughters of U.S. citizens, and their children, if any. (23,400)
Family Second Preference (F2): Spouses, minor children, and unmarried sons and daughters (over age 20) of lawful permanent residents. (114,200) At least seventy-seven percent of all visas available for this category will go to the spouses and children; the remainder will be allocated to unmarried sons and daughters.
Family Third Preference (F3): Married sons and daughters of U.S. citizens, and their spouses and children. (23,400)
Family Fourth Preference (F4): Brothers and sisters of United States citizens, and their spouses and children, provided the U.S. citizens are at least 21 years of age. (65,000)
http://travel.state.gov/visa/immigrants/ty...types_1306.htmlQUOTE
I-130 Petition for Alien Relative U.S. citizen filing for a brother or sister, April 30, 2001
http://www.aila.org/content/default.aspx?docid=21883