Bmw e46 M3 running costs

[Lannister902]

I've always dreamt of owning a e46 M3 since I was a teenager, and I'm finally in a position to afford one. Prices are high, an e92 can be brought for similar money, but I was just wondering if the running costs would be to much to handle on a e46.

Should I leave it as a pipe dream and move on, as I wouldn't be able to look after it?

I've done research on it, and there is things that can go wrong, cracked chassis being one, the pump on the SMG gearbox going are two big ones.
What other potentially big bills may pop up that may surprise me?

If I need to ask this question means I should avoid the car?

Thanks.