For reference, that fancy Civic that I had for four years (34k-76k) required $476 worth of maintenance over those 4 years, which consisted of fluid changes, filters, and wiper blades.
I haven't kept track of mine, but it's similar. I have gone through 1 set of pads/rotors & I'm on my third set of tires, but other than that it's cost me maybe $100/yr in fluids & filters and that is it.
Is a 540i/6 really worth the difference? I know what my answer is.