Hi Squeege,
May I suggest that you put your question to the people on the PPL/IR Europe website at
PPL/IR Europe - Home. They are PPLs who specialise in flying IFR.
The home page of their website opens with the statement: -
'PPL/IR Europe is open to any pilot who is interested in operating light aircraft under IFR in Europe. We now have over 400 members, most of whom are private pilots with current Instrument Ratings, but some members are still working on, or considering, this rating, and a number of commercial and airline pilots are also members.
Most of our members hold British licences but we have members in Belgium, Cyprus, Denmark, France, Germany, Greece, Ireland, Iceland, Italy, Netherlands, Norway, Portugal, Romania, Russia, Singapore, South Africa, Spain, Sweden, Switzerland and USA, and a growing number in all these countries fly on FAA licenses'.
So that should give you some idea.
I'm sure with that amount of expertise to hand, someone there will be able to advise you.
I reckon you will be looking at least at perhaps £130,000 worth of aeroplane; (SEP, constant speed de-iced prop, top class avionics, three axis autopilot).
Good luck!
BP.