1) you will find that many (most?) buyers won't want to deal with someone who is under 18 years old. no offense but there it is.
110% CORRECT! Most people like to deal with people that can be held responsible for their actions. No offense but there is no way I would send money to someone that if things went really really bad I couldn't take to court and deal with.

2) the advice about checking local laws is crucial! you don't want to get in trouble with your local laws, the IRS, or your insurance companies (homeowner's insurance or business insurance).
Agreed. Being in compliance with local laws and ordinances is key to keeping our hobby in a good light

3) if you are dealing with high-end morphs especially....find a vet who is a fully qualified reptile specialist. This is true for any pet snake as well, but if this is an investment you don't want to mess around or you could see your money fly away if you have egg-binding, illness, or other health troubles. Also read some books and get well-versed in methods of getting babies to eat.
Bingo. You'll need to learn at least in theory how do deal with the majority of issues that you WILL have. You will have mites, you will have RI's, you will have clutches go bad, there are things you will have happen and you need to be prepared to deal with them

4) you must be willing to commit your time first to your customers, second to your snakes, and third to everything else. One bad transaction, if you fail to immediately make it right to the customer's satisfaction, can end your career as a breeder. Assume that as a fact and you'll be a good seller! Be prepared to lose money on a sale to preserve your reputation - even if you think the buyer is mistaken. Never let a dispute get personal. This takes a great deal of self control and takes practice.

Good luck! Being your own boss is great...if you are willing to go the extra mile.
One thing I do want to add. You mentioned that your parents will only let you have 2 snakes right now. Cool some things you'll need to think about.

1: Where will I house the babies for a month or more before they sale.

2: What will happen to the morphs that don't sale. Because they don't all sale

3: How will I feed every week 10-100 snakes

4: am I prepared to to keep and feed every snake I produce for its entire life if I can sale a single animal.

Best of luck there.