Been working on https://tryquilt.com, a production service that creates a 1hr polished video interview about a loved ones' life, for about a year now. We did user research, figured out ops and how to tell the stories in a way that folks end up happy with-- with small launches on a few subreddits and a few partnership attempts. Total cost has been in the low $1,000s (mostly test production folks and interviewers + software) with no returns yet. Big sink timewise, on and off between breaks for the day-job. Might use a full CMS (probs Wordpress) from the get-go and maybe something like Webflow or Shopify for faster market testing next time. Also a lot to be done to make the production process leaner (it's been good learning tho!).
Will probably push more, just after the holiday window, then expand to an adjacent market where there are more clear triggers for purchase.