Then if you hit the market you are going up against the most connected, cutthrough, organized and entrenched sales forces from the large device companies who make tech b2b sales look like kindergarteners on the playground. The medical offices, site staff and hospitals all try to block access to your sales force so you are probably going to need to fund and deploy an MSL and RSL force as well and present at all the industry conferences to get any leads and traction.
Then even if you have customers who want your device it won't matter unless you develop a patient access team, lobby to secure reimbursement from insurers otherwise all your previous efforts are wasted. So now you need a market access team and you're probably $200 million in the hole, and you're dead in the water if CMS won't get onboard for reimbursement because all the private insurers generally wait and see what CMS does. Meanwhile any time any of your suppliers change you'll need to run more trials to show validation for safety and efficacy.
With average time to market is 12 years, 75% of new device companies fail for a reason.