Simon: what a breath of fresh air. You seem to have gone to considerable lengths to check out the industry before you apply. This alone will stand you in good stead.
You will be 36-37 by the time you offer your body to science
If you want a future in commercial helos then, there is an above average risk that you could end up doing mediocre work, like the odd part time charter, joy rides, etc. These pay mediocre salaries and the future would be hit and miss to say the least.
IF you are prepared for this (financially and emotionally) then there will be no bad surprises in store.
Alternatively, you are entering the bottom end of the industry for better quality jobs (with those quals). And judging by the level of research you have already completed, you seem to have the aptitude to get yourself ahead of most!
With no dependents, no financial difficulties.....go for it BIG TIME.
Happy New Year.