Rusty has a point. I have 8 1/2 ft burm. Since I am a big boi, I pretty much handle her by myself as of now. With this being said that doesn't mean that I a stupid either. There are alot of precautions that you have to take when handling a burm. Yes they are docile and sweet; but there is a darkside to every fairy tale. Burms darkside is feeding time and unexpected surprises. I have had my share of unexpected surprises. One mainly is when I am cleaning her tanks and I have my back to her, I turn and she right in my face. I know she is not trying to attack, but is just the fact that she is 8 1/2 ft. and if she wanted to she can inflict some serious damage just by biting me.
Antoher thing you have to consider is food. Make sure you are going have a constant supply of rats and some cases rabbits. I say some cases because some burms wont eat rabbits. Make sure that you have atleast three people while the feeding is going on (if you are going to feed outside of the enclosure, inc which I really recommend). This is for safety reasons because I was almost attacked by my burm because I though she was finish eating because she had hid her last rat up under her. When I stuck the hook in there to get her out her feeding tank she lounged at me. Had she made contact I would be able to tell you about this experience becuase I was the only one home at that time.
Enclosures are going to be best if built because that way when that get territorial it's only a space big enough for them and not a room where you are not going to be so lucky if you are not close enough to the door to make a fast get away. I'm not trying to scare you, just trying to forwarn you of the potential dangers of these gental giants.