Hi, may I ask how things worked out for you in the end? We are in the exact same situation.
My wife is the US citizen, I am the sole breadwinner in our family, we have a 6 month and autistic 5 year old, so splitting up our family is entirely out of question.
As proof for intent to establish domicile we submitted:
- letter from my wife’s grandfather confirming we can live in his house
- bank statements confirming my wife maintained a US bank account since 2020
- statement confirming she opened a US savings account and transferred money to it last year
- proof that she opened an investment account in the US and bought stocks
- voting record showing she voted regularly in all elections
- an email showing she gathered information about studying in the US
- receipts showing she already ordered things to her parents’ address that are waiting for us in the US
Still got the message that my wife "might not have a principal residence or be domiciled in the United States. Please submit proof of domicile." - the submitted proof is marked as accepted though. Really unsure what to think of this.
On a side note, this domicile requirement is an absolutely ridiculous and unnecessary burden on US citizens. What better evidence could there be for your intent to re-establish a US domicile than going through this whole visa process and then entering the country together with your family?