If the budget is there to fund the multitude of short term deals we have at the moment then I'm sure, if we bin some of them off, we'll have the scope to bring in what Dunn feels we need. It shouldn't need a fire sale to fund player recruitment. Although it might be needed to fund the stand etc.
Personally, I think we should be ok with the keepers we've got if they had a solid defender/leader/organiser in front of them, Coleman especially.