it depends on what you get. If you get a rabbit hutch the you will prob only have enough height to give him a block to sit on.
I would keep him in for a couple of days and feed him and water him in there, once he knows where the food is he will soon return to it.
You may want to consider the following:-
Don't leave him with food 24/7, get him a routine that you feed him at a certain time of day, prob evening so that when you call him he will return to his home for food and at that point you can also shut him in at night for safety. You can start this routine when you are settleing him to his new home, some fanciers call there birds in, some whistle, etc. What ever you do, it may only be rattle some food in a tin always do the same and he will know what the call means and come rushing in!