A trade or home service

What you'll get

For a trade or home service business: a plumber who built a company and now sells a course for new plumbing owners gives three tests to pass before you quit your job, whether you want to build a business that runs without you on the truck, who your customer is and isn't, and a break-even and cash-runway check. His examples are plumbing, but the three tests apply to any trade, so use them to decide whether you're ready to start.