so, i just ordered my 2nd ball python, and have had my other ball python in a 20 gallon till he was a year old and now he is in a 50 gallon and i spent 400 dollars for it and all of the accesories. So, i was thinking, since i all ready have a 20 gallon i will put her in her in till she is a year, then this is where i start thinking, because i could spend400 dollars for another cage and have to make room for it, or buy this rack system,http://www.reptilebasics.com/iris-cb-70-rack, and sell the cages, what do you guys thing, should i go with racks or cages, what are the pros and cons of each? And if i go racks, how much could i sell a 50 gallon exo terra terrarium with all of the accsesories and a 20 gallon with all of the accessories, thanks.