I had better start saving my pennies for a 4DD and go into getting myself fit.
Mind you a Bullied 4Sub would be just as good for me, less running.
I do wonder why two motors are required.
I had two of Bachmann's 4-Ceps which I ran together on my layout "Meopham East Junction" at many exhibitions in many countries.
At one show, one motor re-programmed itself and I had to remove it. The train ran on and every time it stopped, I removed the lonely power car and sniffed it for overheating. All was well.
One motor or two will not stop me having one on my home layout as I have retired and "Meopham" has been sold!