So what's the best way to connect a Mac Mini running Roon Software that's 100 feet away in another room from the DAC I'm using?

USB Extender (Which one?) or?

Control:15, TwinStores (2) w/Seagate ST33000651AS 3TB Drives, SourceOne, Drobo D5 Storage,
Messenger Preamp, Ayon Skylla II DAC, Gamut D200 MKIII Amps,
Dali Euphonia MS-5, CS-4, AS-2, RS-3 Speakers.