Sorry a bit late to the party.
BMW V10 engine has an Achilles heel in that it's rod bearings fail. The journal is quite narrow and the oil just too thin at high temps to work. It is not a game over issue if treated as preventative maintenance, but it will either be engine out or all the floor and substructures removed....depending on how it is mounted in the car.....either way a reasonable bill......but then piece of mind for a good number of years.
