Mentoring will be conducted through clarity.fm scheduled paid consultation. Expert must have built a marketplace or have full knowledge of how etsy, houzz, zillow, trulia, pinterest system or ebay works.
Clarity has dozen's of experts in this area - some are list here: https://clarity.fm/browse/industries/marketplaces
and here: https://clarity.fm/topics/marketplaces-10183 https://clarity.fm/topics/online-marketplace-12395
My favorites are - Micha Kaufman (Founder/CEO @ Fiverr.com) https://clarity.fm/micha - John Ramey (Founder/CEO of isocket.com) https://clarity.fm/johnramey - Josh Brelinger (VC, previously #5 @ oDesk.com) https://clarity.fm/jbreinlinger - Dinesh Thiru (VP of Marketing @ Udemy.com) https://clarity.fm/dinesht - Fergus Dyer-Smith (Founder/CEO @ Wooshii.com https://clarity.fm/fergusdyer-smith + many more.