Often significantly, because a distribution taken to fund the U.S. business is money no longer available as ongoing household income, and the new enterprise may not pay anyone early. Map the household's income before, during and after the move, and identify what the family lives on in the interval.
Decide who keeps the original company running
If the existing business continues, someone has to manage it while the investor develops and directs the U.S. enterprise, and that person may be a family member whose own plans then change. Settle that before the move.
A spouse and unmarried children under twenty-one may accompany the investor as dependents; a qualifying spouse is generally employment-authorized incident to valid status once the documentation is confirmed, while dependent children receive no work authorization. Set out the household's income month by month across the transition, because the pattern here is unusual: income from the source company falls when the distribution is taken, and income from the new enterprise has not started. Families frequently model the beginning and the end of that period and not the middle, which is where the pressure sits.
Where a family member will run the source business, agree what they are being asked to do and for how long, and whether their own plans change as a result, since an informal arrangement made quickly tends to be revisited unhappily.