Time duration for developing an NFT marketplace depends on the requirements & solutions needed for the development. Once we gather the requirements from you we will start our developing process. If the requirement has some complex features and tech stacks, it will take much time. At bitdeal we create white label NFT Marketplaces in Just 48 hours with inbuilt premium features. If you want to build an NFT Marketplace you can contact any NFT Marketplace Development Company like Bitdeal.