The money is a means to an end. It would be more efficient to steal the drugs themselves. As a first guess, threaten a doctor to steal the drugs and write out a detailed rota of what to take and when for you. Depending on the means used to coerce, leave the country afterwards. Or just live in a country with socialised healthcare

If you’re unsure if it will be for you, pick up divinity original sin 2, same maker and very similar style, but (a) without the d&d license and (b) will cost much much less. Both BG3 and DOS2 are incredible games which you can easily pour a hundred hours into