Build a paying side business on the nights and weekends you actually have, without quitting, without legal blowback, and with a clear number that tells you when to leave.
Your calendar already decided which side business you can build. Most people pick the model first and burn out when it collides with a full-time job.
The usual advice assumes you have unlimited evenings and no employer watching. You do not. You have a few real hours a week, a contract that may claim what you create, and a salary you cannot afford to risk on a whim. That is why most side projects stall: they were designed for a founder with nothing to lose, not for someone with a job to protect.
This course treats your constraints as the design brief. You choose a model that survives your calendar, write the disclosure letter that keeps you out of a lawsuit, keep your work cleanly separate from anything your employer owns, and price like a person who still has a paycheck instead of one begging for the first client. Then you set the single financial number that tells you it is safe to quit, so the decision is made on evidence, not nerve.
Employees with a side idea: want to start earning without putting their job or their legal standing at risk.
Time-strapped builders: need a business model that fits a handful of real hours, not a fantasy schedule.
Cautious would-be founders: want a concrete number that signals when leaving the salary is the smart move.
