re: Outdoor Patio TV/Speaker setup

You may want to look into a used A/V receiver a few model years older from Yamaha, Denon, etc. You could probably find one for $100 that has bluetooth and the additional zone capabilities for other speakers. Then you would also be able to add additional sources (Cable box, Apple TV, etc).

I've bought receivers before on eBay for $100 or so that have worked great.

Edit: Just did a quick search on eBay. While there really aren't any good ones listed for $100 or so, here is one that is a little more expensive. It may be worth it to spend a little extra money for the flexibility you'd have.

LINK