If it were me, I’d be looking to build a hospital on an Indian Reservation somewhere.
Better yet, build hospitals, long term care facilities, rehabilitation hospitals and medical clinics on all the little Native American reservations scattered around the country to serve both the Native Americans and everyone else.
They get better care than the socialist healthcare they get now, they’ll create jobs on the reservation like nursing care and laundry and clerical work that pays as good or better than tourism, they can be exempt from federal regulations, and it will be a much more stable source of revenue than gambling.
Even worse idea. Personal experience here. Federal regulations are multiplied there. It takes a long time to get a business going. One Native Businessman almost had a hotel deal going. He died and it went nowhere. Tribal Reservation sales taxes doesn’t help improve the local infrastructure.
You may want to go with the other poster’s idea of an offshore clinic based on a aircraft carrier.
A combination Medical Clinic and Casino (with name entertainment, etc.)
If Nevada were on the ball it'd happen soon.