About 2 years ago i was down to only 3 budgies , two that shared a cage and flew free all day as long as we were home and a single female that now lived alone because her cagemates died. I acquired several more budgies bringing my flock to 12. I currently have 19 thanks to a couple of the newcomers deciding to make babies.
The life changing thing for all of us was our decision to allow 8 of them to fly free in the house sunup to sundown regardless of whether we're home. We started out by letting 8 of the budgies, including 6 incomers, fly free in the living area while we were home. However, when it came time to put them back in their cages before we left for our part time jobs, the 6 newbies were not cooperative. They were large calm English Budgies, which are slower and easier to catch than regular budgies but we still had to chase them around the room for at least 40 minutes coercing them onto a stick or hand to put them in. This went on for weeks and was stressful for everyone. Finally, one day we were running late for work and decided to just leave them all out until we got home. These budgies were really good about staying out of trouble while out so we figured what could they do? They didn't do anything. When we got home they were all just hanging out on top of their cages. Ever since then the 8 plus three more have only been caged at night. They are definitely spoiled rotten by all this freedom. I think they'd be pretty upset if we suddenly decided to lock them up when we went out and we would feel terrible.