"Other arguments such as the state of current infrastructure at Leuchars seem to be also completely spurious and very short-sighted - if you are buying a house, do you buy a nice property in completely the wrong location for your needs, or do you invest in property for the long-term, in the right place? Location, location, location."
If you already own two houses and you find yourself only able to afford to run one of them then you keep the one that will best meet your future needs at the most reasonable cost, and preferably the one where the roof doesn't leak, the heating and water work, and there are enough bedrooms.
It would be difficult for the Government to ignore the future Leuchars infrastructure bill given that SDSR was predicated on saving money. And retaining Lossiemouth would also have minimal impact on Service families given that Typhoon is only in its infancy at Leuchars - with less than one Sqn's worth of aircraft currently in place. Hardly a strategic uplift if Leuchars was to go. You can easily run Northern Quick Reaction Alert from Lossiemouth - it was done effectively during the Leuchars runway closure for 3 months earlier this year.
There are some interesting views embedded within the RAF Leuchars thread as well.