Divided Tank Questions

[prettylittlefishy]

I have never done a divided tank.

However, I have a 100g long fish tank that I want to use for it.

I planned on giving each male betta 5g.

This would effectively give me space for 20 bettas.

Is this enough for a betta or is it too much?

I have 7, and I was going to move all my bettas into it, except my King Betta, Duke whom would be kept in his 10g, as he likes his space.

If 5g is enough, I'm going to buy another 100g long fish tank, so I will have 41 bettas, plus the 1 at my office.

I'll be cycling both tanks.

The hardest part won't be cleaning, but asking my wife for $1,000 to buy 35 bettas off Aquabid and Bettysplendens. :P