I'd like to buy a cheap USB 802.11ac adapter with external antenna(s), preferably 2x2, that will work hassle-free in AP mode on my OrangePi R1 running OpenWRT. I have RTL8811 & RTL8812 USB adapters but after reading this forum, apparently they are not supported by OpenWRT. I am not ready to spend over $15; for reference, RTL8812 USB that otherwise meets my criteria cost me less than $10.
p.s. I fully understand that USB2.0 on OPi R1 is somewhat a bottleneck, but given real-world wireless speeds I believe it is perfectly suitable for 2x2 802.11ac, these adapters won't realistically achieve more than 400mbps even connected to USB3.0.