Also you can build for ppc64le if you are, or become, a developer for a GNU/Linux distribution. Unfortunately getting ppc64le back online for Fedora copr has no ETA, but you can develop and build for Fedora/EPEL. I can't remember whether SuSE's OBS has it.
You can also run under qemu, but I don't know how solid that is, and there is at least one simulator.
You can also run under qemu, but I don't know how solid that is, and there is at least one simulator.