i asked few people their personal opinions on if it mattered if i bought the big one right away and it all personal perference and if the snake felt comfortable ive also posted pic of my set up n changed it up by their suggestions no-one else seemed bothered by tank size., did my research yes you can start with smaller tank like 10-20 gallon and continue to buy a new one everytime they grow bigger, but a full grown bp needs a larger space. so i bought the 40 gallon and filled it with two large hides that are the same, a large water bowl and a branch, she comfortable and not stressed, if she was stressed especially being in a large space she wouldnt have eaten on sunday or move about from hide to hide or even dunk in the water bowl which ive seen her do once. if she showed she was stressed i wouldve moved her into a smaller one. tank size isnt a big deal nor was it the question in this thread. how to deal with humidity and using a humidity box and what other people do to solve their humidity problem