Resource allocation is often the Achilles heel of growing SaaS or subscription-based businesses. Many organizations opt to build their own tools to manage critical processes. But when does it make sense to DIY? When does building your own tools impede growth? When should you hack it? I once worked with rocket scientists. Back in the day, I led financial reporting, planning and analysis, and financial operations relating to the network and network security at MIT, and many of my colleagues were M...