@audiobuddy You didn’t list a Roon nucleus as the core. If you are using a computer as the core that’s less than ideal (info all over these forums ) as is airplay.
You can find a used Roon Nuc easy enough and then get a used all in one streamer/ DAC unit, maybe a Lumin T2, allowing you to stay with in your budget. This ( pecan pie+) is an inexpensive but very dang good pain crackers steamer/DAC that can be configured as a roon endpoint. I have one that replaced and bettered a Bluesound (also a good place to start) Node.
You might also try calling PS Audio. They had and may have more refurbished Directstream DAC MK1 units
Aurenders are great but are not Roon compatible.