I wouldnt think it would be to hard to switch to frozen. All of mine have been raised on live and I feed frozen with no problems..not to say yours wont. I think as long as they are thawed completely and warmed some it should be fine. I do jiggle the the feed using tongs. I am also currently switching the rest of my snakes from mice to rats, the ones eating rats seem to be gaining weight at a consistant rate where as the ones mice dont seem to be as consistant. As far as buying in bulk..when I started buying in bulk I bought the size of prey that they were currently eating and as they grew past the size and were needing more I would throw two (i.e eats one hopper but needs more add another hopper) till supply was gone, and then up the prey size and repeat.