The Boiga species is a great step into the "venomous" species of the Aussie herp world, but they can be a handful if you are not ready or them. I can't fault the above advice because that's what I would recommend. In a nutshell though, you want to plan for the below if you are looking at a night tiger/brown banded tree snake.
Night Tigers are not a "pet snake". While they don't mind being handled, they do stress easily and are better to look at rather than take out on a day to day basis. They like a relatively high humidity of 55 to 70% and plenty of hides or foilage as they spend most of the day sleeping and become active in the evenings. If you can offer a tall enclosure with 2 or 3 hides and plenty foilage to hide in, you have won half the battle
Its been touched on, but they can be problematic feeders. My male is a great feeder and eats as long as he is active but outrightly refuses to eat if there is even the slightest thing out of place. My female is a pain and constantly needs stimulation to eat. I can sit there for 45 minutes with a fuzzy rat or smallish adult mouse and a pair of forceps twitching and moving it to pretend its alive and maybe get her to eat it 1 out of 5 times. Eventually I switched to a vibrating dish they use for beardies and crickets and now she has no issue. I feed every 4 to 7 days unless they are shedding.
Whilst they are mildly venomous, don't treat them like a python because of it. Their rear fangs are pretty delicate and damage easily and can put them off their food if hurt in anyway. Their venom is still in debate and like a bee, some folks are just more sensitive than others.
Keep their water fresh. I change mine every three days purely because I watch my male who always has a drink when he comes out of his hide in the evening. I noticed after a while that he ignored his water if it was older than 3 days. Considering his sense of smell was better than mine, I took his word for it and change the water every 3 or 4 days.
Ill find some more info and PM you.