To manage cams is lots of effort, is easier to use third party solutions as possible. I suggest public shows should be included in membership, the private chats extra paid per minute. Note, if the public shows are too few, most members can't attend the specific day and time, so may start to ask shows at other times (theorically you make them all happy, including austrailans, only with 24/7 shows...).
A network of solo sites, with shows from all the girls seen across all the sites it may be more worth and feasible, than each site let access only the shows of one girl - so you have more show times and maybe a guy like a girl from a show and join her site too.
This for public shows - then to take them in private, there can be a link to such girl room in a big cam site, with affiliate link of course, and whitelabel or so, but you have them handle all the bill and tech.
Also, for time when your specific girl(s) not do shows, you may put something else such as a cam plugin with shows of other girls, so members see someone in cam always and get used, for when your girls show - this last advice is astually an advertising of chatgf cam plugin, pardon me for sp*am
