Here's a book to get you started
So You Want to Start a Nursery [ILLUSTRATED] (Hardcover)
Here' something to consider. Let's say you want to make $20,000 a year and live in near poverty.
Let's say you have $10,000 worth of expenses.
Let's say you are hawking CP's for $10 a pop.
You would need to sell 3,000 plants a year.
Or 58 plants a week OR 8+ plants a day.
matopis has a really good point. And that estimate isn't even including your growing expenses! As they say, don't quit your day job.
~Joe