Sadly I think Blackpool airport failed because it employed 110 people, there's no way to provide funded work for that many people in a GA regional airport. The need to have ATC on site to run CAT in the UK is a big problem that needs fixing through the red tape challenge work. Nonetheless I reckon a deal with Warton for ATC and say 4 FISOs on the field would be more than enough. Then 7 firemen or so, some support staff who can also do security and you could run the whole operation with less than 30 people.