That's going to be a hard one for the council and especially given the time pressures. Not only would senior finance staff (the s151 officer especially ) be in a position to show such a package was sustainable, they and their head of legal would need to demonstrate that such a proposal was lawful/within powers. That's quite a task for even a month let alone a day or two.
I'll be v interested in the evidence presented. I'd not be holding my breath on this. There may be a legal position that would allow such spending but imo, it would be v hard to be justified if there was no long-term solution. That would potentially open the council to legal challenge.
A bridging loan is easier, so long as there is evidence to back up its repayment, how and when.