The (grass) runways at East Fortune are rather short... might want to polish your short-field skills first! As far as I am aware PPR is absolutely essential, not sure if they'll welcome a Group A aircraft or what sort of fees they'll charge.
What is the parking/handling at EDI these days anyway? Last I heard it was in the region of £85 for one night... that was a few years ago. Landing fee is currently £25.
Smithy