To keep Swap machine running from Exp/Ubq/Etc/Eth to RHC, we need all these RPC nodes. While it's no problem with all - with Eth it IS a problem. First, lot of ****** e. Second, they need a Lighthouse which is a "beacon" to sync with other nodes. And it also requires a lot of ****** e. To keep it running I'd periodically purge the database to start syncing from zero (not the ETH's DB itself of course -the beacon's database) and also make it SLOW with CPU limit - this gives me like 2-3 days of normal operation for ETH RPC, then a few hours to re-sync beacon from zero to top.