Compared to Mikrotik, Ubiquiti only has better UI and more bells and whistles (pretty graphs and so on), while Mikrotik tends to be cheaper and have the same performance and being able to control/configure every aspect of the hardware. If you're trying to build a cheaper kit, I'll probably go for Mikrotik, in this scenario at least (ie not "WiFi in my house/property" but cross-country mesh network).

Agreed. I've got a bunch of their switch gear and have setup WiFi too with no issues. Got a 4G LHG dish setup in a roof for 2 years too which works great (there's pretty much no cell service there with a phone, the dish reaches max bw of the (admittedly slow) closest tower.