Think I'm going to have to go for a RPi solution for the Zigbee stuff as moving things to where the NAS sits and I can't pick up the sensors on the far side of the flat. I'll have to put a RPi near the middle of the flat (which is easy enough).
I can put the NAS upgrade on hold for now as it is less important.
Powered ZigBee stuff works as a repeater so you can stick in a plug or a bulb or something in between.
When I looked at NASs I found building a PC in a case with loads of storage options was still cheaper and considerably more powerful. Power consumption on idle isn't that different, maybe 5 watts.
Think I'm going to have to go for a RPi solution for the Zigbee stuff as moving things to where the NAS sits and I can't pick up the sensors on the far side of the flat. I'll have to put a RPi near the middle of the flat (which is easy enough).
I can put the NAS upgrade on hold for now as it is less important.