Peter
Its not all about extra money for the second engine its also about presence!
I was at Southend with the Jet I fly and a load of PAX.
Parking up we all disembarked and a non aviation knowledgeable commented at a line of single engine aircraft!
"That little one is quite pretty" One lady said pointing at a TBM850.
When I explained that it cost more than the Jet She had just flown she really thought I was joking as in her words "It cannot be worth more than £100 K?
She then repeated something I had said to her earlier about the fact that if a seagull went through one engine we could happily fly and land with the other!
"What happens if a seagull goes through that or it stops"?
I know PW were building a very small turbine equivalent to 250 - 300 hp for Mooney! It was a very low cost unit with v low maintenance and seemed the best way forward for a smart twin to fill a void between turbine singles and the VLJs
Pace