My question is who are you selling this to? If it's just attorneys, that's fine. But if you want courts to adopt it, you will be competing thru a procurement process. This can be death for a startup - long timelines, complicated bidding procedures, and endless requests for customizations. There's huge amounts of money to be made, but by established players who are familiar with the process, built a basic CMS, and can spend thousands of hours of dev time customizing and installing it. Often for just one jurisdiction. Rinse and repeat for the rest of the country...
What I've proposed in the past is a "Wordpress for courts" - a free, open source case management system. It will be more quickly adopted by smaller courts with limited budgets. As larger court systems take notice, they will be attracted not just to the cost and better UX, but the extensibility. The country will benefit by having better, faster access to court records, case law, etc.
I've considered submitting it as a non-profit to HN. And you could easily create a for-profit based on implementation and customization services.