An excellent analysis GtE.
The only thing I would like to see added
is a cost from each of your baselines for the addition of
any other rating.
I don't know what the "differences training cost/hours" from your
NPPL(M), flexwings: £2,940 (cheapest) to JAA PPL (SEP) is in minimum hours or I'd work it out myself.
Just curious if there is a point where the price-gap closes with the addition of a single extra rating or not. For instance
if NPPL(M), flexwings: £2,940 (cheapest) hours only count at 10% you would spend more altogether for your first
additional rating going that route.