Hey there, glad to see ya back!

From the sounds of it I think you are right, he doesn't really seem like a bad dog, just had improper training.

I'd go with hubby see how the dog does with him. Go home & think about it before making any decisions.
Are you experienced with behavioral problems &/or do you have a good trainer lined up?

I think it may be best to have him meet your dogs as well.

Maybe see if you do a trial thing, take him in for 3-5 days & see how he does? Or contact a rescue organization if the owner isn't willing to take him back, see if you can take him there if things don't work out.

I'd have some sort of plan in case things can not work out.
Good luck & keep us posted.