Best Server To Run Roon Core

You don’t need 2 NUCs all you need is an endpoint which could be anything from a raspberry pi4 to any Roon ready streamer. The NUC runs the core and could be attached to a DAC if wanted but most use some sort of endpoint or roon bridge.

How much is the LPS? You can do a decent NUC for about $500-600.

I'm tempted to buy a NUC and set up Roon with my server. The subscription fee turns me off with all of the others I am currently paying for. Maybe it's time to save for the "Life" option if it is still available.

@jmarshak : what is your DAC? 

Consensus from above however, seems to be to keep the server and renderer separate, so thinking for server -to set up a NUC, powered by an external LPS (I might actually have a matching Paul Hynes for this) - total cost for the server with LPS is about $1500. - A separate NUC / PH LPS for rendering would run another $1500 -> for a total of $3500 with cables.

You don’t need 2 NUCs all you need is an endpoint which could be anything from a raspberry pi4 to any Roon ready streamer. The NUC runs the core and could be attached to a DAC if wanted but most use some sort of endpoint or roon bridge.

I agree with Dow Jones here. You don't need another computer to be used as a renderer (or endpoint, what Roon calls it). Depending on what your DAC is, you could use any Roon Ready endpoint. Good value for the money are the Sonore various endpoints (microRendu, ultraRendu, etc.)

FWiW, here's what I've done so far.  

Roon is running on a very low-powered old pre-existing computer (Intel Q9450 - way below an Intel i7 NUC, for example) running Windows 10 and located on our home (wired) network. Despite having up to three zones running at the same time, we have not experienced any dropouts in sound, and appears capable of supporting additional zones. This computer does not do anything but act as a Roon server. We've got our own library of about 700GB of flac files on the server, and additionally I have a Tidal subscription that we access via Roon. Once I understood the advantages of Roon, I purchased a lifetime license. No regrets so far. I will probably upgrade to a NUC (specifically a NUC8i7BEH) at some point in the near future for lower power consumption. 

For my main system, I purchased an Allo USBridge and Shanti LPS to stream to ($400 in total.)  The USBridge output goes to a Schiit Modius ($200), and from there into my preamp.  I'm a former musician, and my preference seems to be for a very transparent sound. The sound quality is very satisfying thus far. Having been bitten by the audiophile bug I am now slowly upgrading other parts of my system - for example, I purchased a Benchmark DAC3 and am going to run some blind tests of that against the Modius. The other relevant factor is the Tidal subscription - I have access to so much additional music (not that everything is on Tidal - it's not), and I'm discovering new things to listen to every day. I've heard $100K+ systems, and they're amazing - no argument there - but the bottom line is that this system makes me very happy on a daily basis. YMMV :)