I must know how well your dog gets along with other dogs as well as other people. If I need to worry about them chewing or anything like that. That's not a deal breaker per say. Magnus has destroyed some things too and that's why I like to put him in a safe and confined space with water when I leave.

I will absolutely take your dog for long walks and runs. I always have about 2 dozen tennis balls scattered in the house for fetch. I take Magnus on my bike rides off leash. He is a high energy dog. I'd only be willing to do that with your dog if he got very familiar with me and trusted me enough to stay close like Magnus does. If your dog badly needs to run and you are okay with him running beside me on leash I'd be willing to do that if needed.