And replied to your PM.
In a nutshell, looks above board - and relatively inexpensive because they're using older and more basic aeroplanes, but I still wouldn't pay too much up front. Maybe 5 hours at a time to save a bit of money, but don't commit more than you can afford to lose. The little aeroplane world is just too fragile, a few crooks, but probably far more people who just got their business plan wrong.
G