Built a validation page before writing a single line of code. Here is what I am testing and why.

The idea is in the personal finance space. I am deliberately not going into the mechanics of how it works because the solution is not what I want feedback on yet. What I need to know first is whether the problem genuinely frustrates real people or whether I have spent six months caring deeply about something nobody else thinks about.
The page took a weekend. The four survey questions took longer than the rest of it combined because I kept writing them in a way that nudged people toward saying yes. Not sure I fully fixed that.

What I am actually trying to figure out from this community is whether anyone here has gone this route before writing any code and whether the responses you got from a validation page actually predicted how people used the real product when it existed.