Hubby is throwing $5K down the toilet…am I wrong for being POed?

So hubby made a deal with friends to buy their truck from them, since they are moving away. They agreed on a purchase price of $10K for a 2007 Ford F-150 Lariat. He made this deal without even consulting me first.

While it would be nice to have an additional vehicle we can transport our kids in (they're still in car seats), we didn't have the money, nor could we afford such a large purchase right now. Again without consulting me, hubby borrowed $5K from our babysitter.

He hasn't been able to sell his current pickup, and his friends keep postponing their departure date. Needless to say, there's no certainty of when we will actually take possession of the vehicle. No written contract was drawn up, and now they have the $5K (that wasn't even our money) and still have the vehicle.

I've asked hubby to find out what's going on, but he doesn't seem the least bit concerned. IMO, he not only put us further in debt, but now we're left owing a large sum to the person who cares for our children (so essentially that's $5K down the toilet).
Added (1). If I even had $1M, I would still be upset. $5K is 5K! But I'm more upset that he has put blind trust in his friends. As long as I've known them, they've stood by their word. But as I said, 5K is 5K. And ultimately, the ones who will be suffering from losing so much would be the kids.

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