Is there a good realm management supplement for 5E or does the

I don't remember if the DMG talks about it, but you can also check Unearthed Arcana for optional rules.

Also try asking in /5eg/ next time.

>>54313497
There is not
It does not

I'm sorry, Anon, this kind of thing is entirely delegated to third parties these days - and has been, really, since 3E came out.

>>54312490
No
No
Steal ideas and implementation from 3.5 and Pathfinder.

>>54315634

2nd Edition AD&D would probably be a better bet.

Spelljammer hasn't seen real love in such a long time, that the idea of different planes and settings being reachable by shifting or giant-hamster-powered spaceships would be novel.

>>54312490
Don't know if they're good but I've seen a few.
One is a free fan made pdf for strongholds
There is also Blacky the Blackballs conversion of the BECMI rules to 5e available as a free pdf from drivethru
Matt Colville is also working on one that will be coming out in the next few months.