Morning Richard
One of our son's ran a 1 series 3 door 118, he hammered it up and down to Warrington for a couple of years with work from memory it had around 160k on the clock when he sold it to a friend he plays football with who is still driving it, Lord knows how many miles it's done now but it still looks good.
Having a Dad with OCD about cars it was well maintained while our son had it and I think now it just gets an annual service. So they can be as tough as an old boot.
Good luck with the search