I second about rethinking before getting anything venomous. Any snake can be quick when it wants to be, and with a venomous it's a whole different ball game. I'm not sure if you're required to have the local hospital keep the antivenin for the species you have, and that stuff has a shelf life though I'm not sure how long. I'm not sure if you'd be required to have them keep it as well, but I know some states do, or I remember reading it somewhere.

Second if you do get bit, depending on the severity and many other factors it requires more then 1 vial, and 1 vial of that stuff can be upwards of hundred's if not close to a thousand or so a vial, and you'll likely need a few. Then what if you happen to be allergic to the bite, and have a bad reaction, you may not even make it to the hospital. Then if you're not required to have the local hospital keep it and you get bit, this means they'd have to find a place that has that species and hope that they have the antivenin you need. It's honestly not worth the risk, and even if they did by the time you got it you'd have damage already and the antivenin doesn't reverse damage done. Then you have to consider all local and state laws regarding owning venomous. I wanted to keep venomous so bad because I want a Cobra or a Boomslang, but I can't justify the risk being worth it. All it takes is one mistake, you handling the snake a cough or a sneeze enough to jolt the snake and your eyes close when you sneeze and WHAM. Not to mention when I was going to be trained by a friend who has a venomous permit he said the best snake to start off with hooking is a racer because of how fast they are.