Unfortunately Grant that's the way things are going. The amount of good usable cars that are being scrapped because of what used to be simple repairs is happening all the time.
Unless the customer can do the repairs themselves or has a money tree down the garden it will happen more.
Most cars (especially upmarket ones with all the gizmo's) need specialist to work on them, have you tried to work on an up to date engine ? gone are those days unfortunately. You can't just bung a head gasket on in half an hour or change a cam belt on a lot of cars in these days of non fixed pulley wheels without all the tools.
Many try and then the phone rings on a Monday morning with " my mate and I did so and so at the weekend and it wont start !"
It normally cost them twice as much in the end