Minimum US Stay After GC

pirate99

Registered Users (C)
How can I minimize my stay in US after I get the GC (Essentially I want to get to US citizenship, apply for my parents' GC and then move to US permanently)

After getting the GC, can I get reentry permit and then
-> then live outside US for 11 months
-> then live inside US for 1 month
-> again outside US for 11 months
-> inside US for 1 month
-> outside US for 6 months
-> inside US for 30 months

How long roughly does it take for parents' GC to go through if I am a citizen ?
 
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