“Cheap” being relative, I think GL.iNet products are reasonably priced, and their software is OpenWRT with a customized web interface. $40 for their small, portable WiFi 5 Opal; $95 for their WiFi 6 “home” router; $130 for the WiFi 6 Opal. The Opals work fine for covering a 1br apartment, but have 2 eth ports. The bigger one (Flint?) has 4.