Unfortunately the ASIair only works with ZWO focusers at this time, no one knows about the future, but doesn’t look like they want to support 3rd party focusers.
the ethernet port is by far the best way to connect ASIair Pro to your network, its 40x faster than wifi and goes as long as your cable. AAP has a very weak wifi signal so it only goes approx 9ft direct line of sight. If you cant run ethernet to your home router, then most buy a separate wifi extender (ZWO or 3rd party) to get better distance and speed… but still the best wifi usually falls far short of ethernet.
also, EQR6Pro is a great mount, I have one. The AAP doesn’t work with it via USB port, you have to either buy a cable called an EQMOD cable for $50, or you have to follow one of the hacks to get it to work. I’d recommend the hack over buying another cable that will be obsolete if ZWO updates their drivers.
the AAP has a lot of potential to be amazing but it has a lot of bugs and issues right now that have gone quite a while without being fixed.. so I am not sure ZWO is really supporting it, but they are still selling them.