Back in the early 90's I bought two yorkie puppies that were about 2 weeks apart in age. Boy I sure didn't know what I had gotten myself into
I had dogs my whole life but this was my first yorkies, lol. They made me cry so many times. I just didn't know what to do. So my dad offerred to take care of them for a week while I was on vacation. He POTTY Trained them with ease. His big secret? He yells DOG OUT!!! while standing at the front door and they'd come running. They catch on to the FUN quickly.
Go outside with them and keep the excitment up at all costs. I take pups out about 10 minute after eating and then once an hour during playtime. They gotta pee before they get to run everywhere. I have found that having one person to mainly do dog out is the way to go at first.
Having said that, my Ben still has accidents. He has IBD and had lots of accidents. When he finally got better, I made the mistake of saying good boy when he poo'd in the bathroom. So he thinks that my bathroom is the place to poo. But overall he does good 95% of the time