Anyone know a good resource (book, video, whatever) about starting a small business, including approximate customer or revenue growth rates and mechanisms to ge

Anyone know a good resource (book, video, whatever) about starting a small business, including approximate customer or revenue growth rates and mechanisms to get customers? So much I’ve been reading is for high growth startups and I wonder what the other end of the growth distribution is supposed to look like. How to know a slightly profitable hobby from a growing small business, for example?