This thread needs an anonymous form with all of the variables that people can fill out
I was going to say similar. Could someone start a Google spreadsheet and create columns for the answers? Might make sense for a few people to work on the columns first before asking anyone to fill it out. Then you can try to get as many DPs as possible and see what there is to learn from the data.
Columns: Location, # of children age 0-2, # of children school age, # post high school at home, Childcare, tuition, housing (utilities and mortgage+taxes or rent), car cost, Groceries, Takeout, Phones & Internet, Cleaning help, Clothing, etc