Thank you everyone for all the replies so far
AdamFrisch, you have raised a number of very good points, thanks for that. Good to hear someone second my prior thinking about pressurisation, and yes, I have come across your single vs. twin thread previously.
For a turboprop the cost of engine o/h, hot section insp. etc is likely to be a killer, and a completely different ballgame than for a piston engine. This is one of the reasons I am thinking about other ways of access than owning/co-owning. If a group of suitably experienced pilots forms, willing to fly a PA46TP, do you think that such group can dry-lease the aircraft instead of jointly buying (and maintaining) it?
Might be a good idea for me to visit Lydd by air (never have) and see those PA46s from close distance...
Regards,
/h88