As to the above quote, how would you avoid the bill if you bought the whole plane.
If you bought the whole plane you would first spend best part of £1000 on an inspection, equivalent to an Annual but obviously with no remedial work done.
This should include a borescope of the engine; essential as many planes spend months standing around rusting away externally and internally. Other things e.g. oil tests could be done.
Whereas the buyer of a share won't be able to do any of that. Not without appearing like he thinks the rest are a load of crooks.
You've got to know and trust the others.