Ocean Sky - new Luton FBO
If they have no hangarage and just one stand, then all their visitors presumably will have to pay the airport's own, not inconsiderable parking fees of £3.25/tonne/hr (£77.90/tonne/day) which frankly is way too much. The clock ticks for each minute at Luton of course.
Then you've got slot issues and constraints, NOx fees, border control/immigration nightmares - don't be a non-EU passenger, the M1 motorway congestion to deal with, airside access constraints, a bit of fog from time to time, noise-related penalties, penalties if you dont pre book with your FBO, night time surcharges. Luton doesn't have a good history on departure delays - it's got the fastest growth in airline traffic of any UK airport today.
Aside from that it's wonderful - good luck to them!