I don't think it's the 5 million holding up the deal. If that was the case, we would've simply added those to the total sum in the shape of easily achievable bonuses over time, and lock this down.
What I do believe is holding up the deal is the structure of the bid. Palace is probably asking for a lump sum payment, or larger portion of the payment upfront, something we might not be able to do, due to cash flow, hence the lengthy ongoing negotiations with Palace.
Even clubs with bigger revenue then us are not able to lock transfers down because of this.