Flippers and California flippers — how do you protect yourself after the sale?

Since buyers can sue years later for nondisclosure, I’m curious what investors actually do in practice:

• LLC structure — one per property or umbrella?

• Any insurance that protects AFTER closing (completed ops, E&O, etc.)?

• How long do you assume liability exposure lasts?

• Do pre-listing inspections and documentation really help?

• What protects personal assets if a claim happens?

Looking for real-world experiences, not legal advice. Thanks