I'm heading to my in-laws in a few weeks, and I'd like to set them up with a new wifi router. The property has two living quarters perhaps 50 ft apart, and the houses are made of stone/brick. Their wifi needs are pretty simple - just need bandwidth for web, email, movies. Nothing much beyond that. I was contemplating trying to make an AX86U work, but those are totally unavailable right now. Any suggestions for a Merlin-ready AX router or router combo used either in mesh or main/AP mode that is relatively affordable?