@SigglesMFC Sounds like the whole datacenter is reaching end-of-life if you're doing warranty extensions on the hosts. I'd explore getting 3 lightweight hosts. Load them with enough RAM so that 2 could comfortably run all your VMs. Put in maybe 4 drives into each as a RAID 10 and create a hyperconverged VSAN out of them.
You don't need to spend on the iSCSI switches or a new SAN then. If you need more drive space, add two more drives to each and expand. VMWare Essentials covers you for 3 hosts.