An alternative could be something like a thinkcentre tiny m700 with a sixth gen i5. It can be found at that price and it's possible to replace the wifi card with a 2.5 gig Ethernet. Then use opnsense or openwrt x86. Mine with opnsense uses 6 watts of power.
But it was such an hassle to properly configure it that if I had to do it again in the future I would just buy the basic Unifi dream machine (costs the same) and have everything done automatically by the easy gui
It's old fashioned and maybe difficult to setup initially but I really like munin