First, can I add my congratulations, for what they're worth.
I don't know who were the experts who suggested a new stabling facility, but I assume that they must have spoken to Abellio/Transportation Scotland. It is somewhat crazy that all the Fife DMUs are based at Haymarket, which is a very constrained site near the centre of a city with very high house prices, and there must be hundreds of miles of ECS working every day.
A facility in Fife might start with secure sidings with facilities for fuel, water and toilet emptying, but I'm sure additional maintenance areas could be added. It's just a pity that all capital expenditure is caught up in the present political mess.