I'm sorry but this is not a good reason. Cortex-A53 is also a good ARM CPU and it runs 32-bit userspace nicely. You may want to note that all S905/X boxes run 32-bit userspace in Android! I see no reason to use my build server resources to build aarch64-userspace builds - this requires lots of time, energy and hard drive space (my arm build folder is 15GB!) and there is no real benefit in having 64-bit userspace. 32-bit userspace is also compatible with ARM plugins that you can't use on aarch64 unless you provide multiarch libs. I will stick to 32-bit userspace builds for Jarvis, maybe when there's an easy way to add ARM compatibility I'll switch back to aarch64 for Krypton/Leia.
OK,
If there is no difference, lets go to 32bits.
Off topic question: your build server is in your home? Or in cloud?
What hardware do you requiere to get other buildserver? Could we donate for cloud build server?
Kind regards.