Ducks fan with my 2 cents.
First, the Ducks have just under 4 mill in cap space due to LTIR according to capfriendly. This would be enough to get Lindholm on a bridge deal but not the long term deal both parties would prefer. This cap space is also dependent on Despres staying on LTIR all year. As far as we know that hasn't been confirmed as there have been no updates about Despres condition. Murray can't commit Lindholm to a contract before he knows what the long term, or at least season term, situation is for Despres.
Second, moving Stoner gives the Ducks 3 mill in cap and actual dollars. This combined with the LTIR gives the Ducks about 7 mill of cap. I am not certain of the Deadline cap accrual rules but the Ducks might be able to accrue enough to allow players to come back. If we do move a Stoner sized contract out we could sign Lindholm to a bridge type deal but again both sides appear to want the long term deal. So to get that long term deal Murray needs to get a firm update on Despres and have a move ready to create extra space. Murray said it himself that there were multiple scenarios that could play out regarding Lindholm. My guess is that he is looking for one that gets him the long term deal.
Third, even if the Ducks do have a budget they can also build some of those savings into Lindholms deal back loading it a bit. I haven't seen an official breakdown of Rakells deal but I would be surprised if there wasn't some back loading in that deal as well.
As for the Hunwick trade, I am not a fan. I think if the Ducks are giving away a prime asset to move Stoner they will want all the space/money. Hunwick would essentially reduce the gains by nearly a 3rd. Yes the Ducks could bury the contract in the minors but they would still be paying him full price and would mean they couldn't demote anyone else the same way, like Holzer, not that I think they would. It just reduces the flexibility greatly. Stoner is a good bottom pairing D. He'll give you pretty safe minutes and stick up for his teammates.
Finally to the OP. I would probably do it. I would want something closer to the 2nd or 3rd that both comparable trades got. Maybe conditions set on the Picks. I'd even add one of our picks if it also meant getting a decent forward prospect as well. In the end I think this is the type of deal the Murray has to make.