developer website for selling proxies

Hello, please read and write a proposal and answer the questions . i will not see any offers without answering. thanks in advance . i want to develop website for selling proxies ( socket proxies ) user can register and choose the right plan ( 10 proxies - 20 . etc ) user will pay using stripe or paypal ( i have the apis) . the system will create the prorxies for the user and send it on email please answer this questions 1- what is the estimated time to delver somting like this 2- did you have a project like this before. 3- how much proxies can the script create if we have 100 ips ?