I want my character to have started an electronics business from scratch at maybe 16-19 (printing circuits with a laser printer and selling them by mail order, something like that), and then by the time he's 35 have said business be a massive entity that manufactures Internet infrastructure used across significant portions of the continental US (and also possibly does money laundering because plot). When you're starting a company, I know you need money at the beginning, and then you provide a saleable (good or service) for more money, and then reinvest in providing more saleables, and so forth, but I'm not sure how much money or how the scaling up actually works, or how you find clients for really big manufacturing jobs. Government contracts, maybe. How would the company have grown between the first stage (tinkering, early saleables) and the current state (industry leader)? How much control could the founder realistically retain over the company during all that? The timeline isn't short-short (~16 years), but it feels pretty short for such a massive transition, especially because clients would have to trust the company to provide durable products; do we need to go into, say, another company failing and leaving a blank spot in the market, is it simply impossible, or is it not weird enough to need explanation? This is backstory but I want it to be coherent backstory. The specific reason I'm posting this is because I want him to be bragging about how self-made he is, and I want to know like, how realistic that is. Because it's very true that he did it! (...he and his organized crime buddies, anyway.) But also he had experienced support from his parents (who run a smaller business together), didn't have to pay his own bills for a long time if ever, etc.