Thank you so much for the info everyone :3
Since I'm such a internet junky, finding a used detolf won't be too hard. If not that, waiting for the $1 per gallon sale for a 40g is another route. Thank you again. ^.^
I found a custom rimless 40g tank purely by chance on classifieds ads! it was super cheap, and I even got them to deliver to me. so with perserverance, you can get some great deals on used stuff