protocol VS Fulcrum

You might also want to consider a variety of social media protocol standards, like how https://member.cash/ does it: https://github.com/memberapp/protocol

Fulcrum. Fulcrum requires more resources than romanz/electrs but it can still run on a Raspberry Pi, and it handles heavy queries much more efficiently. If you're having issues with romanz/electrs, Fulcrum is worth a try.

https://github.com/cculianu/Fulcrum (Electrum server, most wallets rely on it to find UTXOs belonging to addresses)

I am not familiar with EPS so the only thing I am going to suggest is to try Fulcrum which is another electrum server implementation and it's super fast. After setting it up, I let it sync and build the database (it took 8 hours) and now I can connect both Sparrow Wallet and BlueWallet to it both via Tor on port 50001 and SSL on port 50002 with the self-signed certificate I created.

How will you be using the node? FYI for a lot of use cases, an SPV friendly indexer like Fulcrum (high performance version of Electrum) will work, for example through the JS library Electrum Cash. There is also the massively powerful but also heavy ChainGraph. There is also Bitcoin Verde node which uses a SQL database for storage which is nice if you want that. Etc. But yeah, sucks about BCHD for now.

That's you running for example ElectrumX or Fulcrum, or any other Electrum-server implementation on top of your bitcoind.

Or you can run an electrum server on top of bitcoin core, which is what I do. I use Fulcrum, because it's really easy to install. Then you can point your Electrum wallet (Android or PC) or Sparrow (PC) or BlueWallet (iOS or Android) to your own electrum server.