I currently have a female sorority, but it has not been without losses. Female Bettas are cool once you get the right balance etc., but it appears there is also an unknown illness with them. I lost three when I first introduced them, and then another one the other week which may have been through initial bullying (?) - I will never know what caused it. As Wildbetta said, keep an eye on any bullying and have in place the ability to isolate. I have one that has to take rest periods in a breeder net as she seems to sometimes not appear to be herself.
On the positive side, they are adorable and very inquisitive, like the males but on mass. They always want to "help" clean out the aquarium and are very nosy. I have to take care not to get one up through the pipes etc. As with Wildbetta, you need to ensure there are a lot of plants and decor. I have tons of bogwood in their 215L aquarium and have noted each female seems to have claimed their own piece of wood.
I have not seen your other post, but would recommend if you are fairly new and have recently lost a lot of fish you may want to have a general community aquarium first. Do your research on female Bettas and make your own decision, but when I was loosing them early on with no apparent cause I was beginning to feel very deflated, as loosing any fish is difficult, but with the Bettas I find it even harder as each has its own personality. I hate to see people leave the hobby through bad experiences so if you have already had one, be cautious with your next decision. Personally I love the female aquarium I have running, but it was not without its sadness at the losses.
I hope this helps, it is not to put you off, just help you be aware of some of the challenges.
Be prepared to Quarantine ALL new fish to prevent adding anything to the aquarium once established. Keep us posted on your decisions for your next set-up and if you go with the girls ensure you get them from a reputable source.
