Manston is a lovely place for a bit of local aviation nostalgia.
It has a nice little museum, and occasional events like "Wings and Wheels" for nerds such as me.
But as far as entering the world of modern, competitive, commercial aviation goes - no chance I'm afraid.
It just loses money year on year.....
(BTW niknak - I have a hunch Infratil are losing rather more than £3m P.A. at MSE.
And catflaps - You are indeed generous when you estimate 100k pax this year - Capacity looks to be a mere 12 -15k return tickets for Newmarket and Kent Escapes (approx) - and events would suggest Kent Escapes have had problems selling all of theirs.)