Do you think this is a good idea?

Hi, I'm looking to start my next project and I was hoping for feedback of any kind.

My current ideas are:

1. Are my users rich? There's a lot of public data based on addresses letting you know the income of your users. I was thinking of building an API to let you tag your customer data.

2. PDF sorting based on templates. Sorting PDFs is a pain in the butt. Often times, I'll have a form that a few hundred people fill out and then I want to sort it by some field like zip code. I was thinking of building a GUI to make this really easy.