Do a search for "co-habitation", and you will be provided with an overwhelming number of opinions, tips, and advice on the subject...EVERY aspect of the subject...the good, the bad, and the disagreements.
Sifting through all of the opinions on this matter will provide you with plenty of things to think about, and avenues to research in preparation. There are alot of different opinions on this subject, and I honestly believe that the only way to properly prepare oneself for co-habitating corns is to read through those opinions, the ones they like as well as the ones they don't, and truly understand what it is you are going to be involved with in co-habbing snakes. It is not something that is easy to do, and requires a certain amount of experience and knowledge to do properly. Yes, it can be done successfully. But it requires experience and often times diligence to do properly and to limit the risks to your snakes.