I had some savings during the pandemic and I needed to choose between down payment for a house or fund my patient monitoring venture. I had contact with few care home chains and very positive feedback and even agreement for a test run. I was pussy and went for a home. Couple years later no semiconductor parts were available anymore and I was super happy with my cautious decision. I heard of few hardware ventures, which died during part shortage. What an unfortunate time. There was a product, market opportunity, but simply no production material.

The original sensor got discontinued, I have some savings again and would love to try the same with radar approach. Anyone willing to analyze well being of old people from radar data together?

What do you mean by "radar" data? Literal radar? Or am I missing some more specialized term?

It sounds similar to devices that are being tested trying to keep addicts safe.