@light4 For context, Everything I know about foreign born spouses marrying a US citizen then moving to the US is from 90 Day Fiance.
What type of work does she do now? When she moves, will she be eligible to work? Does she need a work permit?
Staying home with kids is one thing. Will she stay home forever? Go back to work? Go read some Mom subreddits and inquire about women returning to work. On top of all that, if she doesn’t work pre-kids she won’t have any US job experience.
How will she establish credit? She won’t have paid into social security. Which is one thing but what if she became disabled?
(You don’t need to answer any of this, just random thoughts I would consider if I were in her position)