I think the Capitol Building needs turned into a museum with enough tours to generate money to keep it open. All Congressional offices should be sold. A college or university could use them for offices, classrooms, and/or dorms. Congress members should have to live, and not just have a home, in thier districts (obviously just the state for Senators). They can have one office, one secretary, and mailing privileges paid for by us. With modern tech, debating and voting can be done via telecom services. It can be live streamed. Easy peasy.
Are you sure they don’t need a conference room large enough for their staffs and lobbyists to explain what they are voting on ? Somebody needs to write the two paragraph synopsis of those 3,000 page Bills so they can claim they read it before they voted on it.