I think I have sorted out the installation sequence, which was not working out for me. Don't know why I thought I would be able to run an installer from within Windows, but then again, it is available.
Going to try a fresh ISO installation of VMware-VMvisor-Installer-7.0U3c-19193900.x86_64 on to one of my servers according to Installing ESXi (vmware.com) and related docs.