It's about the same as any other rate. It also depends on whether or not SKs are located at the unit or at a unit close enough for you to strike. With all of the requirements, depending on the individual figure 9 months to 1 year, not including the time you will have to wait to advance on the striker list.
"I have the terrible feeling that, because I am wearing a white beard and am sitting in the back of the theatre, you expect me to tell you the truth about something. These are the cheap seats, not Mount Sinai."