I'm sure it is hard and time-consuming. But I don't like when groups announce they're working on a show that hasn't gotten any attention before, dropping it soon after, and then get mad at the people who ask about it. If you say you're going to do something, you have to be sure you can do it and not leave the fans hanging, and also not begin new projects before old ones are done (Not counting shows that air at the same time, like Sentai and Rider). It's just common courtesy.
And newer shows hardly ever get dropped due to "real life" issues as do older ones.