I use Roon with a $500 cheap DELL mini computer. I am a power user of Roon since I have 3 Zones for headphones and 2-channel, and sometimes Convolution filters (DSP) on the headphone Zone.
I helped a friend setup an audio booth at a show using Roon on a Apple laptop to 3 Zones. We created a network at the show just for the booth. This was without internet access since we did not want the participants to waste time browsing. So this was not a super powerful network. We also had some hi-res files, but no Convolution filters. The setup worked perfectly.
Roon is really solid and I love it. I was a user even before the product was released. About 7 years ago, I met the son of the PS Audio owner at a show and he was excited about a new product coming out called Roon. Based on that conversation I bought a Lifetime subscription to Roon for $450.