Bedrockgames
I post in the voice of Christopher Walken
Keep in mind though people still prep for a lot of non sandbox games too (because sandbox often eschews things like linear adventure air really heavily structured adventure in general, some of the prep can be easier). The common wisdom for a typical campaign used to be 1 hour of prep for every 2 hours of play (though I have heard different formulations). With sandbox most of the prep is front loaded before the campaign begins. I couldn’t tell you exactly what it is as I don’t time it, but it ja probably a lot in the weeks leading up to running the thing (and I am sure some I have spent months on if I had time: for instance if another player in the group was running a campaign). But once the campaign started I probably did about an hour a week of prep (sometimes thirty minutes). This might increase some weeks if I have to create a bunch of stuff. The key is though this definitely a style for someone who enjoys then prep. If one finds prep tedious the. I would!’t recommend a sandbox (or I might suggest a more contained sandbox).well, put it this way.
How many hours do you spend developing your sandbox? I spent 15 minutes preparing for a three month campaign. That's it. I had three months of play prepped in about 15 minutes. Maybe half an hour because I like my game to be pretty.
You have an NPC wizard. How long does it take to stat out an NPC wizard in D&D? Fifteen minutes? Half an hour for a high level one? Yeah, in the time it takes to prep a single encounter in D&D, I prepped an entire campaign in Ironsworn. That's why I consider something like Ironsworn a much better game for doing sandboxing. The idea that I have to write an entire campaign world, that I actually NEED a campaign world before play starts is why I consider D&D a poor sandbox game. D&D just requires far, far too much work on the part of the DM to be very good at allowing the freedom of choice that sandboxing requires.
I can say what is most annoying about sandboxes: the record keeping. That is true in any game but I find myself having to be especially focused on it in a sandbox. If you take bad notes, that can be a nightmare in a sandbox (we used to record our sessions just so we would have a record). If you start taking bad notes, aren’t organized with record keeping or if something catastrophic happens to your binder or computer, things can fall apart very easily