1. you don't need a whole room deadicated to burm just use a 8 foot monster cage. the demenisions would be 96"X30"X18" in inches. (243.8x76.2x45.7) <-- in centimeters. if you didnt want a monster cage to get shipped in which would be pretty expensive. try to look for a cage that size.
2.your burm is gonna surpass eating rats by a long run. some people continue ot use rats for a burm while others feed rabbits or gp (guinea pigs) ect.
3. Your burm gonna need to be handled or when it gets older it'll be a chainsaw from h3ll.
thier is a fourm for big snakes here and at site i will pm you.