No need to worry about having a $50k vehicle that can't be fixed, because if that's the case it won't be worth much at all. Having a vehicle worth a couple of grand that doesn't run is not so troublesome.
I agree, at that point the engine is a boat anchor
And that is a good reason to swap out engines, like an Indian or a Harley.
The light at the end of the tunnel is actually a train. 2019 M3W