Woodies are the most common i usually find in sydney, i do breed my own. They can usually thrive off not being looked after. i suppose you could put them outside but if you have a really cold day, your breeding results wont be as good as a really hot day as due to the fact they are slowed down in the cold, so the are faster in the heat, so if you going to keep them outside make sure u only leave them out there when you know you dont need alot of woodies. But if i remember rightly your only getting a pygmy dragon so u should really need to breed to many.
So you may not reeally need to keep them in heat .