Then a charging structure based on a wedding might be best, $50 for a wedding (especially if you can demonstrate the ability to save time or money) would seem very reasonable. Personally too much more would seem a bit steep but I might just be tight. Monthly would obviously seem better as a revenue generator, but doesn't feel right to me - this is supposed to be a once off event - even if it is the third time!
Some thoughts on site: 1. On Signup "Who are you" default who you are should be Bride. You may also want to include Mother of Bride in the list. 2. Timezone - why? 3. When - using US Date. Huge market for this outside of US. Either work out dates from browswer or dd-MMM-yyyy. UK market you'd have to make some changes as they divide wedding into 3 parts (church/ceremony, food, dancing) but it would still be useful as is. 4. Expenses - no total 5. Expenses - possibly you want a flag for provisional and actual - catering supposed to be 50 a guest x 100. 90 guests confirm so actually only 4500 and probably confirmed a few weeks before date 6. Guests - nice flow,liked that you didn't have to enter too many details, because I wouldn't enter much. Maybe make it more obvious they only have to enter a name
Looks good, wish I could have set my wife up in this when we got married. Good luck.