Actually I could see this being very popular for wedding planning; something inherently collaborative, with clear categories, that people are actively trying to

Actually I could see this being very popular for wedding planning; something inherently collaborative, with clear categories, that people are actively trying to budget to a specific number. I mean yes, numerous spreadsheet templates exist for this, but you're basically selling a pleasant interface (it does look great!). I have a harder time imagining this for business use cases, unless maybe you really focus on the approval/reimbursement flows.