Tourism ? Trouble is season is what, 5 months and IoM is relatively expensive for what it offers with the big exception of the TT and other events. Not sure what can be done with the other 7 months. Range of accomodation isn't brilliant either. If you are looking for a business friendly service to London are in the off season another solution is required.
Used to be great when I could fly cheap from LTN but wondered at the time how much business 80,000 residents could generate.