Does my plan for 240V subpanel to planned shed 200' away sound reasonable?
The experts will come along to discuss a ton of issues, but I'll point out a few to get you started:

Conduit Size

The big cost with PVC conduit is not the conduit. It is the digging. Whether you do it by hand or with a machine, the digging is the hard part. At current Home Depot prices (and you may do better elsewhere), the difference between 3/4&quot; and 1&quot; is $ 1.20 for a 10' piece, or a grand total of $ 24 for 200'. Go &quot;big&quot; now. It doesn't cost much, and the cost of having to redo it is a lot more than $ 24.

Subpanel

Even if you only need one circuit, a subpanel makes sense. There are a bunch of reasons. One of them is GFCI protection. With a single circuit, a GFCI trip will turn off the lights as well as the tools. With a subpanel, you can easily separate the lights from the receptacles. The main breaker on the subpanel will also function as a shutoff switch for all power to the shed. You can also put in a 40A or 60A or much larger subpanel even if the feed is 30A (which would typically be enough to provide for 4 15A or 20A 120V circuits). Again, the big cost is the labor involved, so don't put in a &quot;just big enough&quot; subpanel, go up a size so you have expansion room - e.g., if you decided later to turn the shed into a real workshop then you would only have to replace the feed wires and the breaker in the main panel but not replace the subpanel.