I read it twice. At first it read like they are looking
for crew. Then the other shoe drops at the end, and
they want your money.

You didn't waste anyone's time. If you enjoy wasting
your time, your time is not entirely wasted.

Good luck finding paying crew. If you ever want to hire
crew, come back.

"Anthony Redshaw" wrote
The Sea Cadets in the UK has Charitable status.

The normal routine for the week is with 24 Cadets anywhere from 13.5 years
upto 18.sailing around the coast of the UK. The ship usually takes part in
the Tall Ships Race most years

The trip is run as a Sail Training week with adults learning the ropes
instead of the younger Cadets.
For a weeks training all found I think the cost is very reasonable.