Hi
Okay forgetting the coolness factor of twin turbines. I am looking at this purely from the point of view of increasing the aeroplanes survivability.
Modern jet equipment is fairly reliable however twin jets where one jet can supply 2/3rds of the required thrust will certainly give me a fighting chance of getting a several thousand pound sterling investment back in one piece.
it will give me a much reduced sink rate and as regards it is twice as much to go wrong is incorrect it is twice as much to keep going.( IMHO)

Mike