Time to upgrade Mac mini 2014

I'd actually recommend you keep the Mini if aftermarket support for minis dedicated for streaming was still there. I used a series of modified dedicated mini streamers over the years, definitely superior to mid tier and lower off the shelf streamers. I'd suggest the Wiim more lateral move than upgrade from the stock mini you have. 

The mini got a malware bug, some kind of search engine hacker, and I have neither the time or knowledge to get rid of it. I tried a couple of apps in the App Store, and they won’t work on that old os. 
im gonna start with the WiiM, it’s cheap enough, and go from there. Likely I’ll be back :). It’s the nature of the hobby….

thanks for the help!!

That sound fantastic another soldier recruited for the Streaming Wars! Welcome to the Darkside. 
please be aware that you are allowed to buy your commission in this army. You don’t have to start out as a private. I’m not saying you need to be a four star general, but the equipment you have is going to allow you to be at least a captain or major. So if you’re part of the group that likes to cry once buy once, then, may I make a suggestion to this offering. 
https://www.audiogon.com/listings/lisbf522-innuos-pulse-mini-media-servers

I would get another Mac mini, transfer files with set-up utility. Done. Did that recently, no regrets. As pointed out elsewhere, streamers typically include a DAC, so you are in a forced marriage of file management and file processing. Separate Harddrive/computer and separate DAC give you more flexibility. Also, as you have a lifetime Roon (like I do), you do not pay for management software all over again. my 2c. 

 While lots of integrated streamer/DACs exist, in the high end it is more common that streamers and DACs are separate