Embilletado is a fantastic slang term that literally means "flush with cash" or "loaded." It comes from "billete," which means banknote or bill.
In the song, Manuel Turizo sings about how a good woman makes a man happy, and as a result, he's "embilletado y sonriendo" (flush with cash and smiling). It's a fun, colloquial way to express financial prosperity and happiness, directly linking it to the positive influence of a loving partner.
"La Buena Mujer" ("The Good Woman") is Manuel Turizo and Luis Alfonso's tribute to a partner who lifts a man up rather than draining him.
The verses open on a common worry: a man without money doubts whether love will ever find him. The chorus answers that doubt directly - a good woman does not just love a man, she makes him better. She pushes him to work harder, keeps him content, and because of that he never stays poor for long.
The song leans on a playful trade: the more she loves him, the more motivated and successful he becomes, so being loved and having money end up going hand in hand. The ad-libs and closing lines keep the tone light and celebratory, toasting the woman being sung about rather than dwelling on the earlier worry.