Perth (Scone)
Perth has a 'Skylodge' on the airfield offering reasonably priced modern accommodation. (Approx £20 per night if you are staying a few nights)
If you are seriously interested in using Glasgow International let me know and I might be able to help!
Cumbernauld also has a few decent hotels nearby.
Most airfields in Scotland has either some very close accommodation, or some very friendly natives willing to help!
Allan