Hi, CTlovesKS,
you've probably got more detailed info by now, and have an idea of how much has to be saved up and braced up for, but some of the best sources of information I knew seem to not be much present anymore.
Don't know what happened to everybody; I went waaaay back looking for posts to get the breeding info Modaz and Netty and Bronzecat used to have links to in their sigs, and saw nothing in any of their sigs...
But bettas do cost a fortune to raise, there may literally be hundreds of fry, with approximately half of them each eventually needing individual tanks/jars to give waterchanges and feedings to.
If you're breeding random pet store fish, you have no idea what you'll wind up with - and very likely very little hope of selling/giving many away.
You can breed a pair in a 10 gallon spawning tank, assuming they don't kill each other, (once they've been conditioned and carefully introduced without being able to get at each other, with the female removed immediately after spawning but generally allowed to recover in another separate tank, not a sorority) but (a) much larger grow-out tank(s) is(are) needed for the fry, plus those potential hundreds of jars for males you'll be cleaning daily for months, heating pads for the jars, fry foods - and they should have live food cultures - and endless cetera.
Personally, I wouldn't tackle it myself, even if I could afford to do it, and even if I had fish worth breeding (and/or young enough) and the knowledge required...
Maybe somebody like LauraFrog'll show up soon, but this has been here a couple of days already with no answer.
On the plus side, this should bump your post up to where you may get more detailed estimates and answers - if you don't already have an idea of what's involved, you might really want to find out about such things before you start making the sort of investments required.
Even the amount of room needed would be a consideration...
EDIT: somebody called up an old post 'Website Update' or some such title.
Try looking at:
[URL="http
/bettaparadise.co.uk/store/Default.asp"]http
/bettaparadise.co.uk/store/Default.asp[/URL] for some information on what's needed for breeding betta Splendens.
I have young betta Tussyae I'm hoping will breed in-tank for at least a few survivors, but these don't routinely need to be separated - I have two pairs together on a permanent basis - lovely and very personable fish, but not long-finned.
Re-edit: I have Walter and Micro worm cultures as well as Vinegar Eels ready to feed any fry which may be produced and survive, although the in-tank chances are probably pretty low, despite heavy planting.
I wouldn't feel happy about not having a variety of tiny live foods available for fry, (I didn't until recently and many of my unexpected Pygmy Cory fry horribly starved to death while I waited for some to arrive, as fry foods and flake particles weren't recognized as food) and the cultures do need constant care as well, whether you're currently using them or not, although the Vinegar Eels are about as easy as you can get.