Best thing to do is to call the Small Business Admin because they have volunteers who help people create business plans.
This is the little I know: articles that say someone invented something and within a month made $200M or even just $4000, are leaving out a lot.
I talked to a friend who is into making something that she occasionally sells some of, say, hand lotion.
She puts in lots of hours, she has to pay for however she distributes, she has to be careful not to overpromise.
She does not really make money doing this. When you figure out how much you need to make per hour, you have to take your normal rate of pay and add at least 1/3rd to it, because you have additional taxes and costs to pay.
That hourly wage is spread out over the time you spend making lotion and the time you spend doing everything else involved in a business: recordkeeping, selling, arranging venues, etc. So you kind of spend half your time making lotion, and half doing the other stuff, so you need to double the amount of labor in your lotion price-setting structure.
You will not make a killing unless you happen to have a huge amount of money stashed away somewhere to provide capital. If you are lucky enough to get a contract to provide your product to a big seller (say hotels for those little lotion bottles they put in rooms), then you can get a loan to cover the expenses and you become a manager of the product instead of a creator and you have to deal with companies making what you need (lotion and bottles), and all sorts of stuff.
People who make a substantial amount of money in business are few and far between. It would be nice if it were otherwise.
