First of all, you say you are prepared to take care of the fry, how so? Do you have the number of tanks necessary, (2.5g minimal tanks for as many fry as can -possibly- be had) or a reliable source to sale them through, or do you have other plans in mind?
Everything I've read on betta breeding says they need to be in the same tank together, but still be safe from one another, in order to get in the mood. We had ours almost breed the other day (probably would've if we would've spent more than an hour watching them before we had other things to do so we split them back up) and all we are doing is we got a glass vase the exact same height as the 10g the male is in, put the female in the glass vase inside his tank and feed them both
brine shrimp and a very protein rich diet. The goal is to have them see one another for long periods of time (days on end) and get them a little extra fat on them, because it takes a lot of energy to do their breeding. Our female spent the better part of a week and a half in that vase inside the 10g before we first introduced them and they did marvelously, and will probably breed the next time we try that. It is always harder with virgin betttas, apparently they are like any other species... instinctually they know what to do, but the awkwardness and fumbling around still occurs.
We actually watched as the female would curl up like they do when the male encircles them, he would just swim by her and look at her, then he'd start the encircling action, but she'd be 3 or 4 inches away from him.. like they are practicing their method.
If you use that method of female inside a container inside the male's tank, make sure to cover the female's container.. it keeps her in and the male out.
I still would like to know how you plan to take care of them. They could have as many as several hundred fry... and in the off chance that you have the majority of them survive you could be looking at a seperate tank for each male by the time they are 3 months old, and the females would need a large tank, and may get aggressive and need to be split up.