Adult Dog for rehoming

It breaks my heart but I need to rehome my Adult dog. He will be 5 years old come November, he’s a Bloodhound/English Mastiff mix, may have some Labrador or Golden retriever in him. He’s really nice natured, gentle giant, great with kids, (Ages 6+ just because of his size). He’s 53kg so he’s a big boy, he would be better going to a home without cats and toddlers. He tends to push the cats around, he also wouldn’t be suitable for a farm as his instinct is to track smells so he will wander. He’s a rescue, has terrible separation anxiety so would be better off with someone who can be home with him or take him with them. Serious inquiries only please, I’m not in a rush and will only be giving him to a home that suits his needs.