I never really understand the 'no money' arguement . There are types being phased out in the next few years that have been money drains! We will loose Tornado - Tristar- some Chinooks and undoubtedly Puma. There is money to be had for new purchases of MPA simply from the reduction of types on the inventory and the resulting savings in support costs.
As to where to base MPA's -maybe a curved ball that sees it based at an under used base as opposed to the traditional Brize/Waddington thinking!