You are not alone. I'm a mom of 6, and at one point I had three in diapers at once as well. My oldest refused to potty train, no matter what I tried, until finally, at almost 4 1/2, he just decided he was going to do it, and he did, no training required. At the same time, my 2 1/2 y.o. daughter wanted to also, so I went from 3 in diapers to 1. It seems like no matter what you try, they won't do it until they are ready. I think consistency is the key, as in anything else, ie. just picking one method and staying with it, and trying not to pass on the stress to them, because it makes them even more resistant. We found that setting up a reward system helped, but honestly, with so many, I actually have mostly taken the non-training approach, just because I don't have the time to keep taking them to the potty at regular intervals all day long. Fortunately, my oldest was the only one who held out that long. I just made sure all of them were exposed to the potty and to their parents and siblings using it, which wasn't too much of a problem since it seems kids always gravitate to you as soon as they see you headed in there! :) They each pretty much decided they wanted to do it too. Wish I could be more helpful, but this hasn't been one of my strengths! Good luck.