ESXi installation may fail in middle of installation, e.g. following screenshot show installation stuck during 24 %.
Installation ESXi 6.5.0 An unexpected error occurred See logs for more details. Timed out: [Error 110] connection timed out.
At this situation, press ALT F12, you would see VMkernel live logging.
This issue comes because faulty SD card OR invalid driver. The scsi command are being aborted by SD card. The hardware vendor should be contacted to replace OR troubleshoot SD card.