It seems to me like you should not offer a free trial (a money back guarantee might be better)..Not too sure a monthly plan makes too much sense for planning a wedding either, since it is a one time event. I would also increase the price. I believe I paid $50 for some crappy seat arrangement software that I ended up never using a few years ago. Feel free to disregard my advice of course, since you definitely have more data than I do. All in all, I think you are onto something here