If you have not got your snakes eating f/t yet, I wouldn't go buying a bunch of them yet. Best way imo is to continue to buy the live that your feeding now, 2 per snake at a time. Each time you feed, try a fresh kill first, if they refuse then you can freeze it and start to get your frozen stock started. Then just feed the extra live so you don't skip meals. Continue to do this and even if your are having a hard time getting them to take the fresh kill, your not wasteing rodents. Once one of your snakes takes the dead, then you'll only need to buy two feeders at a time, offer fresh kill to the one that hasn't taken it yet first. If it refuses just give it to the one converted. Eventually you'll build up frozen without having to order in bulk and waste a bunch of defrosted rodents in the process of converting them and you won't need to skip meals. Just be consistent with offering dead first and they will eventually get it. If your really having a hard time getting them to switch, you can eventually stop getting the extra live and only offer a fresh kill, if they don't take it freeze it and then wait a week to try again. I don't like to starve them in the process so I try that last but most convert without needing to. All mine were live eaters when I purchased them and I've converted all of them within a month. Once they are eating fresh kill, it should not be hard to take the next step to f/t. At that point you can order in bulk. Good luck!