I actually have the opportunity to move close to one of the Mayo clinics and we have enough income to live there and pay for ACA insurance. What we lack is the funds for initial evaluation and treatment until we can obtain ACA health insurance.
So sorry to hear you're going through this!
Moving to the US from a foreign country
qualifies you for a special enrollment period in the ACA marketplace. Even if you couldn't sign up for insurance taking effect right away in the month you move, you should be good to go at the beginning of the next month. You've been living with this condition for a year now. Could you go without much treatment for the first few weeks after you move?
Of course you would need to research the ACA insurance plan options in your new locale carefully to make sure you pick one that actually has the Mayo Clinic in its network. Do any of them?
Do be careful to tell them that you're not moving
only to seek medical treatment, else you'll have to wait until open enrollment at the end of the year. Have another thing in mind (job opportunities, family in the area, got sick of Spain, something) to cite as another major reason for your move, a reason you'll plan to stay a while even after you get your condition under control.