About 25 years ago, I built a 12x14 layout wired for two throttles. Maybe 10 years ago, I switched one throttle to DCC. The layout used Walthers (Shinohara I believe) code 83 turnouts. The main line used Tortoise machines while the yard, and a few sidings, used hand throws using the power-routing built into the turnouts. I did have one switch, the yard throat, that refused to power route. For that I substituted an electric caboose throw (220S). Everything worked fine. Each switch had the frog rails isolated. The frog and its rails were switched either by its own power routing, by a caboose throw, or by contacts within the tortoise machines.
I only had two DCC throttles so I never worried by power districts or seperate circuit breakers.
Recently I have moved, put part of the old layout into storage, and am waiting for a new layout room to be built. I purchased a 3-way Walthers DCC-compatible turnout to put into a logging siding. Whoooaaa! This is a new switch; it requires external power routing, things just got way too complicated. The basic caboose throw seems obsolete as it provides no power routing. I suppose a frog juicer would do it but at $15/frog. I was hoping to simplify the new layout design using more hand throws, less machines and control panels. Where are we going? What does a beginner with a small layout do?