A new guy’s looking for a six.

Hello, in my long life I only had to deal with BMW twice. In the 60s I had two 501 baroque angels and at the end of the 80s a Z 1. But now I look more and more often after an E 63. I like very well. But my (free) workshop tries to slow me down, not to say to prevent it. She says that with the extensive electronic the problems are pre-programmed and I will only be dependent on BMW. But I can’t do that at the moment. I would definitely buy a vehicle under 150,000 km, if possible even around 100,000 km. What can I expect in the next few years if I drive about 7,000 km a year? Thanks Karl