Is it reasonable to charge 500 yuan for home decoration and mobile visual doorbell?

Belonging to the convenience service, it should be lower than the market price.

Either look for someone who understands weak electricity, and it should not be difficult to extend the line.

Or privately ask the master of the property company for help.

If there may be problems in the future, the master will take the trouble not to intervene in the maintenance.

Think for yourself.

I hope to give you a reference.