Welcome to PPrune! As I am sure you are aware this is a "how long is a bit of string" question. If you are happy with two seats and do some work yourself than you could get a Jodel 117 or similar for around £14k;
Insurance around £1000
Hangarage (midlands) around £1000 on a strip, £3000 on a licensed airfield.
Maintenance for a year £1000
Fuel 21lph of UL Petrol.
My own aircraft is an MCR01 Club (worth around £48k). The actual numbers are;
Insurance £850
Hangarage £1000
Maintenance £340 (average over 8 years)
Fuel 18.5 lph UL Petrol.
Off round Europe in her in a few weeks, but it is a reasonable weather only machine. If you want to fly in bad weather with icing then the cost is huge.
Rod1