Play music from laptop over WiFi to existing audio system: how?


I want to play music from my laptop to my existing stereo system over WiFi instead of a USB cable. I find plenty of systems designed to stream music from the Internet but I'm not interested in that. I want to play the music from my laptop. I also find plenty of USB DAC's but I don't want to have a USB cable. I also don't favor Bluetooth because WiFi offers my bandwidth and options.
I looked at the Yamaha MusicCast WXC-50 and while I see that it can access files over the network using NFS (my preferred network file share protocol), it appears that in this case the laptop act as be a passive storage device. I am hoping instead to use the music player on my laptop to send music to my DAC/preamp as if it were connected by USB cable. But, of course, I want to do this wirelessly.
Is there a solution similar to what I am looking for?
lowoverdrive
@tcatch - That's very interesting. I might buy it. Looking closely at it now. I wish Lightning DS was available for Android. But if I can play music using the music app on my laptop and send it to the Auralic mini, that is what I wanted to do anyway. So, to be sure, I can use my laptop connected to my home network via WiFi and stream music to my DAC through the Auralic mini, right?
Also, I read that the retail price is under $500. So why is this used one $550?
Here's something else I just learned about:
https://hifiberry.us/Those are not much more expensive than a Chromecast Audio and much more flexible. I'm not a big Google fan.
It's amazing to see the price range of the various solutions. From almost nothing to over $2000. The HiFiBerry and the Auralic Mini both interest me.
But I would imagine the audio quality of wifi connection would be inferior to that of USB simply because of the unstable nature of wireless connection.  
Interesting Auralic Mini review here:
https://darko.audio/2016/02/audiophile-grade-streaming-with-the-auralic-aries-mini/

If I was an Apple person, I think the Auralic Mini and the upgraded power supply would be a great choice. But not being able to (not wanting to) use one of its best features, the Lightning DS software, deters me from the Mini just a bit.

Also, am I right that that listing is a bit overpriced? The new price for the Mini is $549 with a 1 year Tidal subscription ($240 value). Without Tidal, the Mini is $399 (outside US). The power supply is $299 (I think). Without Tidal, it seems $550 is a bit high for a used one. Or am I wrong?

One interesting thing is that this shows the hardware I want can be built and it is in the price range I had in mind. Surely some other companies must build hardware like this too, and I'd like to find some of those offerings.
Specifically, a WiFi enabled device that connects via USB to an external DAC.

From another review of the Mini:
Here’s the big question: does it sound better than my DIY Raspberry PI streamers? Hmm, I’d say they are about the same with the PI being a whole lot cheaper. But if you want a ready-made solution, nothing beats the Aries with its great software ...
https://www.musicservertips.com/product-reviews/auralic-aries-mini/

So that gives me yet more reason to think about the HiFiBerry or even something a couple steps up from that. All these Pi solutions will let me run Linux, which is what I like.
If the HiFiBerry sounds about as good as the Auralic Mini like the reviewer says, then it is by far my preferred choice over a Chromecast Audio too.
Interesting thread. Thank you all for the ideas.