WHATS THE BEST TUB SIZE IN QT TO KEEP A BALL PYTHON OR CORN SNAKE?

i am planning on getting a reptile/amphibian but cant make up my mind between a pacman frog, corn snake or ball python but the only reason i am walking away slowly from the ball python is because of the price but i have a sterilite 60QT 57L tub is long not very tall and i know is enough for the snakes but i may have to buy a 10 gal tank for the frog but can you guys help me out please with the decision also which is the best to have and equalled price (including setup) for each thank you