Hi, Sir. I can absolutely help you. I have full experience xbmc/kodi project.
I am very familar with Python, C++, Java.
I already developed not only the serveral xbmc addons(for [login to view URL]) but also customized version of xbmc for android. If you want I can show you my previous works.
I read your requirement line by line.
So, I have questions for you.
1) You want kodi or xbmc(xbmc changed it's name to kodi since 14.0)?
2) Let me know the device e.g. Amlogic M3, M8 etc..
3) List of addons you want to install, I suggest Genesis, iLive, Vevo etc...
(I think that It depends on the customers you are targeting i mean market.)
4) Need to develop the standalone android app that communicate with the backend.
5) Let me know about the payment business for customers in detail.
6) Can you provide me the server access so that i can develop the PHP backend for service of xbmc update.
Am i right cool? Speaking of maintaining the server, I can support for long-time with high-quality.
Hope to chatting more.
Regards, Jing.