It's good to know the reality of what you might be getting in to so at least if you make the decision you do so with full knowledge.
Some things to consider:
Do you live close to a dealer so when there are problems it is not a major trip to resolve them?
Do you have the tools, space, and knowledge to do some maintenance and repair works yourself?
Are you willing to accept the car being unavailable to drive for weeks or months at a time as it being repaired?
Are you willing to devote significant time to various problem solving issues about the car?
The M3W is definitely not a "gas and go" car!
As a prospective owner, this is all veeery scary....