I would think its about time that Manston got a low-cost, no-frills airline.
The airport has a number of reasonably sized towns close by including Dover, Folkestone, Canterbury and the Medway Towns. Similarly the airport could easily put on a bus service to Ramsgate Station where the train ride to London is just over an hour.
Although this does rubbish the Now philosophy of flying to the main airport and not a "field in the middle of nowhere" but I hope that Now and Manston make a success, because between them they have a great team of people.