Hi, Lonnie, I suppose it makes sense to ask somebody who actually works with staff to make design and tests for you.
I actually suspect that your problem is related with metal coating on windows -- in almost all modern windows (last 15 years at least) glass has metal coating, reflecting heat back into house. It is invisible, but works very efficiently as metal shield for Wi-Fi.
Advice to you about test with open windows came from person knowing how staff works, and it is really a good advice. Check if connection is good with both windows open -- and I an sure it will be. Than you'll know that windows are a your problem, often brick wall makes less loss than windows in it.
I have meshed APs on distances about 500 m with performances 30MB/s and without packet loss, for ZF63 it will be probably a bit less, but nothing near to to mentioned by you 30 m. But without obstacles. And without obstacles includes not just optical LOS, but a zone about it (look on Internet about Frenel zones).
And of cause, you need to put APs in reasonable orientation ( horizontal in the same plane will be the best).
You must understand also, that power and RF propagation is same for any vendor Wi-Fi equipment -- power is limited by regulations, but propagation is set by laws of nature, and difference comes from better antennas and better receiver sensitivity, and in these 2 things Ruckus is really good.
By the way, you can mount ZF7363 outside of building, if you put it into watertight box. It is a cheap alternative, if you can't afford real outdoor AP (which are expensive because they are made very reliable). I have some customers running such APs for 3 years and more, and they are flowless.
Hope it helps,