Vu+ Zero 4K on the market very soon
If you are waiting for the cheapest VU+ 4K receiver you will not have to wait much longer. The VU+ Zero 4K is ready very shortly.
The Zero 4K will arrive first with a single DVB-S2X tuner while there also will be a DVB-C/T2 version coming in January 2018.
It has one built in card reader and one CI slot + 1 USB 2.0. 4GB Flash and 1GB Ram running a ARM 2 x 1500 MHz processor.
So if you want 4K but do not need FBC tuner maybe this one is for you.