its hard to give exacts but...maybe, it depends on all kinds of factors not different then anything else. factoring in tapering, the dose at the end, it may need to be more then 6 weeks total. also could taper up as well which may increase total time
often 10-12 weeks, kind of a typical prep time, again not always for everybody, is often the time frame
the taper is to help rebound after, but with anything there is always possibility of shut down, which will often be made worse since other supps are stopped at the same time- (often post show) along with other stoppages combined together ie diet cardio
i think if you factor in the time, finances, avail, age, condition, past exp, risk tolerance, and ability to stick to a program before and after whatever d day that is in mind - most setbacks and issues can be mitigated and sometimes even avoided. the planning and execution of the plan will dictate her success and then subsequent rebound back to "normal"
this, it seems like is the nature of your questioning, and in those details will be the best answer for her overall success and safety/peace of mind