shares
I am grateful for some really useful replies to my original question.
In my case the aircraft I am looking at is a Cirrus, so the figures, even for a group of 12, are quite large. I am sure it is good advice to buy outright if possible. A new Cirrus is a snip at around £250,000 (base model, of course). I will have a look down the back of the sofa later to see if I am anywhere close. Thanks again everybody.