SMB client to stream video and audio renderer

[alflopez]

Hi, I was about to finish the kickstarter survey, but I thought it was a good idea to first ask some stuff in this forum. Here go my requirements:

I want my Pine64 to connect to a HD that is plugged to my Asus  rt-ac68u home router via USB. The router is sharing files on the HD via SMB. It has the option to enable the DLNA server, but that does not seem to be working because I can't see it as a media server on the BubblePnP app for example.
I would like to use my android phone to control the Pine64 and stream video files (mp4, mkv, avi, etc) to my TV via HDMI.

I'd like my Pine64 to draw power from the TV via USB. 
I would like to use WiFi rather than a physical ethernet cable.
Also, I'd like to use my Pine64 to stream audio to an old stereo system via its AUX port (like chromecast audio would do).

Should I just add an enclosure, the wifi module and the 3.5 mm audio jack?
Do I need to include a microSD for them to install android on it or will android be installed in a different media that is included by default?

I will appreciate it if you guys, which are obviously more experienced than I in these matters, validate my idea.
Thanks!