live streaming app

Hello I am looking to create a desktop application that provides live video stream and is compatible with several different operating systems (definitely both Mac and Windows). I would also like it to work on tablets and iPads but that can come at a later stage. The purpose of the app will be to operate multiple Webcams simultaneously providing several features such as green screen, picture in picture, 3D masks and props, desktop screen sharing, bitmoji, video sharing, to name a few. I'd also like it to have filters and lenses similar to snapchat, where it can "beautify" you or add several looks over your face, like age you or put puppy ears, etc. The most similar application is "Manycam" and Snapchat. I would basically like to offer everything Manycam offers with some tweaks and additional options. I have added their link for ease of reference ([login to view URL]). The problem with Manycam is that it requires a lot of RAM, so it would be great if this new app takes up as little of the CPU capacity as possible. I also would like to make it more user-friendly than Manycam as some people find it too complicated. I do not need all the features at once, there can be some minimum features offered starting out but I wanted to ensure that all of the features were possible to add to the app. I am curious to know if this is something you would be able to do. We can discuss further my thoughts on the project. If you are able to do it, what would be the timeframe and price for the minimum (tbd what the minimum would be), as well as for the final app. I have tried to be as detailed as possible but feel free to let me know if you have additional questions. Thank you!