If a start-up can figure out a way to provide the mass financial information that Bloomberg provides and charge even 1/10th of what Bloomberg charges ($20,000 per year), it would disrupt the monopoly that is Bloomberg.
What you are likely to do though is bring in new users who were price sensitive or who couldn't justify $20,000 for their particular use-case. For those who wouldn't spend $20,000, $2000 is a lot easier to swallow.
So instead of taking Bloomberg's market, you'd be more likely to create a second tier of service.
Nevertheless, there's no shortage of niche financial software/data products in the $2k per head range, but there's a reason they're not growing big enough to threaten Bloomberg.