Did i miss something or where did OP mention that he will only connect to his electrum server within the same local network?
I wrongly assumed it.
It definitely makes sense to connect to your own electrum server via Tor if you are doing so via the internet and don't want others to know you are sending/receiving bitcoin-related traffic.
No one will know what you're doing if you connect to your electrum server through port 50002. Information won't be transparent, both your main & remote pc will communicate using encryption. Unless I missed something, it doesn't make sense to me. You'd use Tor if the server wasn't yours and you wanted to protect your privacy.