Looking at the RSP website they have a lot of grown-ups in the assembled team of consultants and advisors so will know what it takes to get back up and running and then the running costs thereafter, no doubts there in terms of the knowledge base within the team.
The questions are what will it really costs to get back up and running - there is zero infrastructure, everything ripped out and flogged off when it closed, you can't just flick the lights on, there are no lights! There is literally nothing there aside from shells of buildings and huge volumes of concrete and tarmac. Timescales to be up and operational is a huge grey area, I suspect theory and practice will be miles apart.
Then the business model on a maximum of 14 freighter rotations a day has to be supplemented by a pile of other revenue streams, what are those likely to be - geography has a very significant impact on that viability?