I am an entrepreneur based in San Francisco who has spent 3 years building a healthcare-related company. I have dropped $150K into the product. I have a few customers but no traction. I feel like giving up, but $150K is a hell of a lot of money to have put in.
Warren Buffet says you should never give up on a company. Simply change the leadership. If your product has no traction that means you need to restructure your marketing efforts.
Of the 150k you dropped in the product, how much was spent on marketing. What channels are your competitors using to market and are you using similar methods to meet the preconditioning of your market.
If you are breaking into a new market then your marketing cost will double. You may have to give products away, guarantee results and money back, etc. or get someone famous to recommend it.
Last but not least you can try to move your product via sales affiliate marketing.