It would also depend GREATLY where you actually LIVE in the US.
California and New York, because of the cost of housing, tend to be more expensive than the Mid-Western states. It also varies greatly from city to city within those states. A nice 3/2 house in Desert Hot Springs goes for about 125K to 150K. Yet, only 20 miles away in the city of Indian Wells it would easily bring 500K. Same with apartment rents. It's varies greatly.
I do understand food is much cheaper here. I can understand why. The state where I live grows 20 percent of the worlds produce. Plus, most things are available year around. Again, price varies by State and even can vary by area of state. I know that the supermarket where I shop at has "zones". They price their products according to the competition and average income of the area.
Fuel IS cheaper. Unless you live in a city with GREAT public transportation (usually a LARGE city) you will HAVE to have a car. That means having insurance and a license. That also varies by State.
Then, there is medical care. Very expensive. Health insurance in a must. Hopefully, your employer will have a good plan. Even then, most expect you to pay a share of the cost. For instance, 50%. That can easily run into several hundreds of dollars a month. And still, you have co-payments, deductables, and preauthorizations. We have to fight with our insurance company all the time over prescription medications that my spouse needs.
I would never recommend anyone from another country to just move here. Visit first. Hopefully, a long visit. And don't just go to the tourist areas. Some euros love it here and some don't.
Andee