Nothing against the business, but if one were to start a lifestyle business, I can't think of a worse one than a marketplace, where you have to deal with refunds, inventory, legal issues, tons of advertising, upfront losses, etc. You're probably better off actually selling your stuff in these marketplaces, if you wanted a lifestyle business.

When I think of lifestyle businesses, I think of Pinboard, or Appointment Reminder, or a Depop/Poshmark/Etsy storefront.