The great thing about minimalism is that it varies from person to person, so is unique to the individual.
One good description I’ve heard(from the minimalists) is:
“Minimalism isn’t that you don’t have things, but rather that the things don’t have you“
Three examples of what minimalism could be:
1) Joshua Becker is a minimalist, but has a house and cars/etc. in suburbia.
2) FIREcracker who travelled the world for a year with nothing but a small backpack that would fit under a seat.
3) Perhaps the ultimate minimalist might be along the lines of the famous fictional character Jack Reacher – with nothing more than a wallet and passport?
Although I would update this for modern times to add a cellphone(for checking in, transport & banking), and by staying in airbnb’s rather than motels – cutting down on the annual expenditure for clothes and increasing the quality of lodgings significantly.
If Jack had achieved FI, then he could live comfortably forever and not have to work. Any income from working would be a bonus on top.
As with my post on success – the answer is unique to you, and to you alone.