Online video course selling LMS

Hello, I want Udemy kind of online course selling Wordpress LMS. I am searching different LMS online. What i expect from you: 1) Need to find proper and cheaper Wordpress LMS. ( If free not available then will buy LMS/Theme) 2) Need to help to setup Wordpress LMS in hosting, payment gateway in WordPress. 3) If any minor changes require then need to help. 4) Need to explain feature and how to setup wordpres... etc wordpress related information. - Tutor LMS, Lifter LMS, Learndash....etc many LMS i seen on internet. you need to search and comup with good LMS which can satisfy online course selling needs. ==== Main feature of Wordpress LMS should be.( For your information and understanding) 1) Payment gatewy integration - India and Out side india with multi currency 2) Want to Add Paid Course. So user can buy course for 1 month , 3 month or 6 month....example. Or can set fix 2 month subscription. After then Course will be expire. 3) My plan is to create course category wise. Ex: Programming Interview Preparation --> Inside that Different Programming Language C++, JAVA ,..etc Inside C++ --> Multiple course of C++ 4) Want one time cost. to buy LMS. after 1 year if i dont want further update/support then it should work. 5) Secure video play Viemo or other video. 6) Certificate 7) Backend Admin panel with different good features 8) Good frontend, Responsive.