What does everyone think is the hardest thing about building a SaaS business at the moment? I want to make it easier with StartHQ (https://starthq.com https://

What does everyone think is the hardest thing about building a SaaS business at the moment? I want to make it easier with StartHQ (https://starthq.com https://starthq.com) and some of the things I've picked up on are: identifying early adopters, managing private beta invite codes & identifying related apps to integrate with.