A K3, in theory, would really be very helpful for my husband and I in our bid to move to the USA. He is a US citizen but no longer has US domicility as he has been living here with me for 6 years. If I got a K3 we could move over there together and solve the domicility problem, giving the IR1 app a better chance of success. BUT I keep hearing that a K3 is expensive, takes forever and might not even be decided before the IR1 and so wouldn't even help solve the domicility issue. Advice much appreciated.