I am an ATCO and have been living in Troon for 19 years.
There are plenty of decent places to live within a 30 minute drive from Prestwick, both established properties and some new developments.
Kilmarnock has some very nice new homes being built on the western outskirts, have a look at the Robertson Homes (also in Ayr), Charles Church and Persimmon websites.
For ATCOs and Pilots, there should be something to suit your budget and currently house prices are pretty much stable up here.