There are breeders, finding them is the trick.
Boards like this help for sure. And mom and pop fish stores are great for finding everything you need as well as some information about what you need to get started.
Some will sell you an entire "kit" but DO post questions and double check things the LFS
tells you because they are not always "right" or sometimes giving you only part of the info. Big chains (in my experience) often have people with very limited knowledge who don't know and sometimes make up the info if they need to or unwittingly give you wrong info.
I have learned far more here in the last year than I ever have reading books or talking to the folks at the fish stores.
I love the freshwater fish (although there are few things more beautiful than a SW
fish are a lot easier to find most of the time because they aren't as expensive to get started.
For ballpark figures of startup costs it is hard....I can tell you I just set up a 90 gallon FW
fully planted tank and it cost me the following:
$250 stand with canopy
$40 acrylic (for my terrace)
And that does not count any fish yet (most of them transferred over from my 55)
High tech planted is about as expensive as FW
gets and if you are not going planted you can knock off about $500 (for this particular set up, plants can be done cheaper with a low tech setup)
here is a link to the page I built about setting it up:
Welcome to my planted tank page