Hobby vs business: the real difference is structure
Revenue does not make it a business. Structure does. A short guide to telling the two apart.
Who owns what, on paper, in what proportion, and what happens when someone leaves.
How decisions get made and who is accountable for them. A board, an advisory circle, or simply a written decision rule.
The repeatable way work gets done, so quality does not depend on who is in the room.
Separate accounts, honest books, and a picture of the numbers you can read in five minutes.