Sonos connect amps are the way to go. Per the sonos website you can actually connect up to 4 speakers per sonos connect amp. Sonos connect to each other by their own mesh network and you access it through an app on you phone, tablet, or computer and you can independently control each amp. It does not matter where you place them because you don't physically interact with it, only through an app. However you probably will have all your speaker wire going to the same place so by default all of your sonos will be in the same space.

i have 5 sets of speakers and gooing to get 3 amps( so 3 zones)

If you get 6 sonos connect amps you effectively have 6 zones. The can all play different things or the same thing or any combination thereof.

Denon & Russound (made in USA) have smart app amp applications that compete with Sonos, literally more features.

Well that's the best DIY solution, but it can get pricey with that many Sonos Connects Amps. You are talking about $2999.94 total for Sonos. For a little less money you could buy any audio matrix and 8-zone distribution amplifier powered by a control system like Control4 or RTI that would so the same thing (and give you 8 zones if you felt short in any locations). You would have the added bonus of being able to integrate lighting, security, surveillance, pool, etc. at some point in the future. Generally we love Sonos as well and recommend it often, but if you get into too many zones it is actually the more expensive solution. With that many Sonos connect amps in one spot you would be signing up for an aggressive fan system to keep them cool as well if you want to preserver their life. Just an FYI.

Also Sonos Connect Amps are rated to power 2 pairs of speakers at 4 ohms (we are Sonos direct dealers so we get access to engineers). Thus if you could live with a little less flexibility you would use 1x Sonos Connect Amp per 2 pairs of speakers and then when you run your speaker wire drop an analog volume control in each location. This would allow each rooms volume to be adjusted. The downside is that you would be forced to listen to the same thing in these two zones.

Russound has a 6 zone & 8 zone streaming system. Www.russound.com A siingle led keypad can control each zone separately or together. Also, an easy smart app for tabket, Android or iphone.