You can easily run your own copy of everything but the PLC server, but if you use DID:Web account types you're not dependent on that either.
Even the relay is cheap to run now. $34 a month for A FULL RELAY is less than what it costs to run a large Mastodon server
https://whtwnd.com/bnewbold.net/3lo7a2a4qxg2l
Hosting your own account with your own PDS server is simple.
Running your own feeds and moderation labelers isn't even possible in Mastodon.