Downloading VMware ESXi 6.5 for free is currently difficult because the version is End of Life (EOL)
If you are looking to set this up yourself, I can help with: vmware esxi 6.5 download iso free
Use VMware ESXi 7.0 or 8.0 free edition. The hardware requirements are slightly higher, but you get security patches and modern drivers. Downloading VMware ESXi 6
Need help finding the direct link? Check the r/vmware subreddit wiki for archived download mirrors, but always verify SHA256 checksums against VMware's official values. but with limitations:
ESXi 6.5 is free, but with limitations: