So long as you are not using any 'common areas' of the property, you shouldn't need management approval. If you need to run cables through a common area, or access a common meter, then you will most likely need approval. I suggest you contact a couple of Tesla's recommended electricians (or your own if you have a preferred one). Keep it simple, and you'll keep costs down. 40A single phase (50A breaker), or 32A single phase (40A breaker) should be relatively easy and cheap to get done, and either would be fine for overnight charging.