And don't expect to be the toast of your fellow FI's who need the salary and wages in general to be kept as high as possible... I don't know what your day job is but how would you feel if someone started offering your services for free at the weekends? I know there's a demand and supply argument but you will be unpopular treating the career they've risked everything for as a weekend hobby....
A more pragmatic solution would be to buy your own esoteric public cat plane and offer conversion type training or something without the need for an AOC or an approved training organisation...