This is a silly idea. The reason you bought a 7-series and not a Mondeo is because you wanted a nice car.
I own a couple of rep type cars, and an S-Class. There is not a cat in hells chance that i would do that kind of mileage in a Mondeo. It will feel like such a downgrade to you, it will make you feel rock bottom. Arent the gearbox's in these (i assume you would not tolerate a manual, i certainly wouldnt) also a bit suspect?
My opinion is to write the value of the 7-series off and just drive it until it no longer works. It will go for years and years, and will be one of the best cars you could possibly have for the task.
My S is what...12 years old nearly(!), its STILL an amazing car which is not bettered by anything really for what its used for. It still looks absolutely king of the carpark in every boring corporate car park i ever park in. Your 7 will be too regardless of how long you keep it.
I own a couple of rep type cars, and an S-Class. There is not a cat in hells chance that i would do that kind of mileage in a Mondeo. It will feel like such a downgrade to you, it will make you feel rock bottom. Arent the gearbox's in these (i assume you would not tolerate a manual, i certainly wouldnt) also a bit suspect?
My opinion is to write the value of the 7-series off and just drive it until it no longer works. It will go for years and years, and will be one of the best cars you could possibly have for the task.
My S is what...12 years old nearly(!), its STILL an amazing car which is not bettered by anything really for what its used for. It still looks absolutely king of the carpark in every boring corporate car park i ever park in. Your 7 will be too regardless of how long you keep it.