I see no one else replied….......
There seems to be different rules applied between regions but in overview
Full pensioners receive Spanish National Health cover. (Transportable rights EU law)
Early retirees receive a limited amount of cover based on the years contributions they have made in their home country
Work in the system (good luck!) on a legal contract basis and you will get cover for your wife as well.
Be self employed and pay autonomo
Take out private health cover - investigate the types of cover some will take you.
The Valencia region is supposed to take everyone (well EU anyway) but some towns try and bounce you.
You will need a Spanish social security number to get a SIPS card - this gets you into the national health system.