How did the whole family immigrate to America?

I suggest that you can apply for investment immigration, talent immigration or NIW immigration. All of them apply for family immigration by themselves, and different immigration projects have different requirements. What these projects have in common is that they don't need employer's guarantee, and they don't need American relatives.

Investment immigration: you need to find an intermediary company to choose investment projects. A better project is about $6,543,800+with a minimum investment of $500,000. Now that the migration time has been arranged, it may take five or six years.

Immigrants with excellent talents: they need to have national media reports, TV interviews, or have won awards, and they are excellent talents in the industry. This kind of immigration is fast, and it usually takes about a year to immigrate successfully.

NIW: You need to be an excellent talent. Generally, it takes two or three years, which is lower than the requirements of investment immigrants for outstanding talents and does not require investment.