Echoing what Jim said above, my only experience growing orchids is outdoors, in Florida. Very different from your situation in Pittsburgh. As he says, Ursula and Kathy are our two wonderful orchid gurus on this forum. I'm pretty sure they both have greenhouses, though. That makes life a lot easier, growing orchids up north, for sure! Our outdoor weather here in the cooler months could be said to approximate indoors fairly well - days in the 70's, nights in the 50's, and lower humidity. I know I keep the windows open most of the time from late October through most of April.
But I've been on a big learning curve, reading everything in sight, and tapping the great experts on two forums for 3 years now. There are some basics which it sounds like you've got a good start on. Just about the first rule for orchids is that their roots need air, so your whiffle ball, and clay orchid pot sound excellent. I don't think you're going to be able to put your Phals out in your trees, because over a summer, if they liked it their roots might grab the bark, and you'd have a devil of a time dislodging them when winter loomed. I'm finding that my mounted orchids need watering nearly every day (yes, even in our summer humidity) where the ones in pots with bark or chunky medium can easily go several days to a week without a dunking. This is good for me because I travel quite a bit. On the other hand, when it rains cats and dogs for days as it does here when we have tropical storms go by, I have to worry a bit more about overwatering with my potted orchids. They take refuge under the house overhangs, or under the patio table.
Here's my moss story - several orchids I've bought have come to me with a big, soggy fist-sized ball of sphagnum moss up under the plant. This is a very common practice, and you'll see it a lot in orchids at places like Lowe's and Home Depot. So all including my little Phals that I got at IKEA for $10 got re-potted immediately into bark mix (at any garden center in a bag that says something like "Special Orchid Mix") when they came home. One was already in trouble and dropping its buds. It wilted, then recovered but has not re-bloomed for me. The other is truly a champion, and the only Phal of the 4 I have that has not ever wilted or sulked. It held onto all its buds and bloomed from Labor Day through December 1st. Then it put out another spike in February and bloomed for another couple of months! Now it's throwing new leaves like a crazy thing.
I started out with two Phals that were a gift from my daughter, who said "Mom, you just can't live in Florida and not grow orchids!" She sent them to me from California, and both of them immediately dropped all their buds from the shock of travel. After I learned something about taking care of them, the bug had bit me. I started buying other orchids saying to myself "well if I have to fuss over these two, I may as well have more". Whoo boy! Anyway, what I've learned is that if you can keep Phals alive and healthy, you can probably grow other orchids just fine. As Jim said, I think Cattleyas and Dendrobiums are two types that are much more sturdy and forgiving. The one in my profile photo is a Dendrobium.
Here's the Phal Phamily at my house. Top right is my champion with 3 new leaves this summer, top left is its sister, and the two at the bottom are my "beginner" orchids from my daughter. Never exactly robust but they have both re-bloomed. The variegated one is mounted on a palm boot with coco fiber - the score's not in yet on whether that's working . . .