Back when I was reading up on bloods I found a formula that seemed to make a lot of sense as far as housing for them. You take the length of the snake in feet and multiply by 1.5. (f)X1.5= necessary amount of square feet needed. So in your case 4.5X1.5=6.75sq/ft. If I were you I would be looking for something in the 4X2' range equaling 8sq/ft of floor space.