Update.
The guy has been doing great. I dedicated a section of the garden to him and he's set of taking the whole back yard. Fortunately it's brick wall and cement with gates. Our small family dog goes and checks on him every day with zero aggression.
I just rescued this from someone who didn't want it and I'm researching what its going to need. I've had iguanas as a kid and feel this might be similar. It all starts with knowing the particular species