I'm impressed by your application; it's good that you are doing so much interviewing. Probably the killer feature is automatic compliance reporting; I could imagine that this will sell the software.
But to me this sounds more like bespoke software for a single client rather than a startup.
If you want to apply with this idea, you need to make sure there actually is a market for your software.
I've seen many people attempt a "startup" by writing software for free for one client, hoping to sell it to other clients with similar needs. These other clients then never materialised, since the software usually ended up too specific and was only useful for their original client, who got to use it for free (or very cheap).
Based on our research we think the guts and functionality of the product are portable to other use cases in the legal system. We might have to tweak the data model a bit, but the guts of the application should stay the same.
Also, although the market for PDs is "small" in the grand scheme of startups we think there is still plenty of money in it to at least generate enough cash flow to start a company that builds this class of solutions for high volume legal practitioners.
But to me this sounds more like bespoke software for a single client rather than a startup.
If you want to apply with this idea, you need to make sure there actually is a market for your software.
I've seen many people attempt a "startup" by writing software for free for one client, hoping to sell it to other clients with similar needs. These other clients then never materialised, since the software usually ended up too specific and was only useful for their original client, who got to use it for free (or very cheap).