Which one should I pick, AOS or CP? What is the difference in terms of costs, wait time and complexity?
Is your parent already in the US? If not, then CP.
I checked the USCIS website. It says the I-864 is $0.0. Could not find the DS-230 fee. Are they set depending on where the Consulor is?
I could have them get B visas to come to the US again and then file I-130 and I-485
How long does each one take?
I read many cases on this board that parents are in the US on B visa and then AOS filed to get them GC. Any particular reason TheRealCanadian said that this is a bad idea?