If you paid millions in taxes personally, then you have sufficient funds to qualify for investor/job creator visa (which in turn leads to a green card as well). I have family that were able to accomplish this with as little as 500K and 2 years, but depending on the scenario it can take as much as a couple million dollars (depending on location and nature of business). I am sure this is stuff your attorney must have explained to you so probably there is context I am missing here.