People were encouraged to go and be a part of the rebuilding of the temple. Not everyone had the opportunity to do so. This didn’t give them an out of participating in the revival. It just gave them a different avenue. 
The people were told to support those that could go by sending money and help to get the job done. 
Discouragement can set in if we aren’t able to be on the front lines participating in services, seeing the benefits of revival first hand. But it doesn’t need too. You can still be involved through prayer, through encouraging words, by giving what you have to help it keep going. And for the people that are able to witness God’s work up-close, be sure to relay back to the people supporting it what blessings are taking place. 
Scripture taken from: Ezra 1:3-4