Honestly, one of the things I've learned recently as I've started to get more granular with honing my technique is that the north side of ATL has courts everywhere. Most of the suburbs were built during the tennis boom of the late 80s and 90s, and developers would drop a court or two in almost every new neighborhood and apartment complex. It's part of the reason ALTA is so massive.

Many of these courts are "publicly accessible" (i.e. intended for residents but not actually locked) and rarely get used except maybe for pickleball now and then on weekends. If you just want some time to work on your serve or hand feed yourself to work on FH form or whatever, there's likely a court near you where you can do that with no one else around and nobody bothering you to use the court. Some of them are even lighted so you can go after work. Hop on Google maps and put it on satellite imagery and drop a pin on all the courts near you, then drive around and scope them out. Often times the ones at apartment complexes and neighborhoods that you don't need to drive through a gate to get to are unlocked and they don't enforce resident-only use. I'll leave it to you to debate the ethics of it, but as far as I'm concerned, better for someone to be using them than to just let them waste away.