Morello boards are hard to come by, but there have been efforts to offer cloud-computing style use of them, especially now that bhyve support exists; if you're interested I can try to find out more (I'd offer you time on my cloud-computing Morello cluster from MSR, but it's offline for silly reasons). The "Big CHERI" RISC-V FPGA boards are indeed quite expensive, but CHERIoT-Ibex runs on the Arty A7 or the purpose-built Sonata board, and those are much more reasonable. (I'd still love to see it brought up on cheaper boards, too...)
Morello boards are hard to come by, but there have been efforts to offer cloud-computing style use of them, especially now that bhyve support exists; if you're interested I can try to find out more (I'd offer you time on my cloud-computing Morello cluster from MSR, but it's offline for silly reasons). The "Big CHERI" RISC-V FPGA boards are indeed quite expensive, but CHERIoT-Ibex runs on the Arty A7 or the purpose-built Sonata board, and those are much more reasonable. (I'd still love to see it brought up on cheaper boards, too...)